uBitx IRF510 to IRF510 physical measurement
looking to buy a large heatsink to use on my uBitx when it arrives. Can someone (that has a uBitx) measure on center to on center from one irf510 to the other.
looking at using this one:
Aluminum Heat Sink Heatsink Module Cooler Fin for High Power Amplifier Transistor Semiconductor Devices with Dense 24 pcs Fins 5.9"(L) x 2.3"(W) x 0.98"(H) 1pc/ 150 mm (L) x 59mm (W) x 25mm (H)
https://www.amazon.com/dp/B073VDVVP5/ref=cm_sw_r_cp_tai_xsrsAb5YJE73T
Thank you
Bill ng1p
|
So did I, my date's different from yours tho. I only ordered Thurs nite.
Vince.
toggle quoted message
Show quoted text
On 12/31/2017 09:11 AM, WA9GQT via Groups.Io wrote: I just received this post today(Dec 31).
Dear Customer,
Happy New Year!
We have received your payment of USD 119 on December 23, 2017 through
Paypal. Your payment has been included in the 'Pre order' list. The
orders are being shipped in the order of the payment received. It is
difficult for us to estimate the shipping date for your order. However,
we are putting our best efforts to ship them asap. The tracking details
of the shipment will be updated on the Paypal transaction once the order
is shipped.
We are overwhelmed with your response for micro BITX and we are
encouraged to do better and roll out new products.
Please cooperate with us for the delay in shipping your orders. We look
forward to your continued patronage. In case, you have any issues, get
in touch with us at hfsignals@... <mailto:hfsignals@...>
HFSignals Team
Thank you Ashhar
Happy New Year,
73, Rod WA9GQT
--
Michigan VHF Corp.
|
Re: A dual-band transceiver - trcv005.pdf
Interesting.
Just months prior to the bidi thing of???
Back when many of us still had dark hair.
Lots of relays and 2n3866's.
Jerry, KE7ER
toggle quoted message
Show quoted text
On Sun, Dec 31, 2017 at 07:59 am, Michael Hagen wrote:
|
On 12/31/2017 11:26 AM, K9HZ wrote:
toggle quoted message
Show quoted text
Well my company will manufacture the tuner, but i will need a
bunch of beta testers to work any bugs out. ?
Dr.?William
J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
?
Owner -
Operator
Big Signal
Ranch ¨C K9ZC
Staunton,
Illinois
?
Owner ¨C
Operator
Villa
Grand Piton - J68HZ
Soufriere,
St. Lucia W.I.
Rent it:
email:??bill@...
?
On Dec 31, 2017, at 8:10 AM, Gordon Gibby < ggibby@...>
wrote:
?If you guys make this happen, I'm going to be rather
amazed.? ?Even if it merely does a clunky search search
search algorithm in the beginning......
It can later do the intellituner thing with the smith chart
type calculations.? ?
I'm able to actuate my MFJ 993B intellituner easily on 80
meters and usually on 40 and sometimes higher with my uBitx
running just 12 volts to the finals and doing digital.? ?But
that thing was about $270...........
As Ashhar pointed out....someone should form a company.?
?Crowd-fund it if you wish.? ? Get printed circuit boards.?
(I even learned how to do that!)? ?think about how to make
sure it works for every possible mode & application.....
For scanning systems like WINLINK, it would be wonderful if
it could move to memory positions on RECEIVE (which means
the VFO has to output something, or you have to use a
frequency counter to watch it)
For ALE, the freuqncy changes are TOO FAST to follow with
relays.
Cheers.
gordon
I agree
with Rod...it should have its own Nano. The issue
really isn't the processing power, but the ?BITX I/O
lines are pretty scarce. Plus, you can buy the Nano
for $3, so why not? Finally, it would make the
software development a little easier since could be
run "alone" during testing.
Jack,
W8TEE
William,
Count me in.
I would be inclined to implement it it a
separate case to be used with other
rigs,also.
What are your (er) current thoughts on
separate Nano vs integrate into ubitx's
Nano?
Hope it has its own Nano, and does not rely
on the ubitx. No problem if not, I can
simply supply a Nano and make the tuner
believe it is 'talking' to the ubitx.
Maybe I will come up with a
stand-alone-controller-project for your
tuner, so it can be driven with two wires,
start and done.
I am interested in supporting this project.
Regards,
Rod KM6SN
On
12/29/2017 07:05 AM, K9HZ wrote:
So after
finishing up most of my projects a few
days ago¡ I really needed something to
do¡ so I put on the drawing board¡ a
100w automatic tuner that can work
with the uBITx (intended to go inside
the same case actually) that provides
power, SWR, band memory for same
antennas, low power tune, bypass, etc.
all in a kit form for about $30.? I¡¯m
prototyping the think now and will
work on the tuning/communications code
(to integrate into the Raduino)
shortly.? I¡¯ve contacted a few of you
off-channel to work out some
protocol/communication issues¡? but
Stay tuned (double play on words
there)! ???
?
?
Dr. William J. Schmidt - K9HZ
J68HZ 8P6HK ZF2HZ PJ4/K9HZ
VP5/K9HZ PJ2/K9HZ
?
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
?
Owner ¨C Operator
Villa Grand Piton ¨C J68HZ
Soufriere, St. Lucia W.I.
Rent it:
Like us
on Facebook!
?
?
?
?
Good pickups!
?
So the ALE (automatic
link establishment) crowd, much like
the WINLINK crowd, tend to use LOTS of
bands....and thus they find ways to
make their antenna systems work on
mulltiple bands.? ?Here are some of
the most popular ways:
?
1.? ?Fan Dipoles (time
honored technique of tying multiple
dipoles together at the CENTER, and
the energy tends to go to the correct
one, since all the others present much
higher impedances.? ?The wires "fan"
out with usually wooden spreaders at
the? end and some string involved to
keep them somewhat separate.? ?Been
there done that many times, my college
ham club has a 3-band unit up on the
top of an 11 story building rightnow
that I built for them.? ?Build for
yourself, dirt cheap.?
?
2.? Auto-tuners? ---
everyone makes these now and many can
tune as soon as they see RF, or even
return to previous settings that were
memorized.? ?LDG,? and others.? ?Low
power versions for $100? ?End fed wire
to balanced line fed dipoles---they
work with lots of different kinds of
wire.?
?
3.? Inherently
multiband antennas:? ?example, full
wavelength loops.? ?Build for
yourself.? ?
?
4.? Carefully tuned
end-fed transformer-fed antennas ---
there are now several of these on the
market and they give an acceptable SWR
on mulltiple harmonically related
bands.? ?Tend to be close to $100
?
5.? (the one I
dislike)? resistively terminated
folded dipoles --- these use a
resistor to make up for what a folded
dipole can't create and give an SWR
that is "acceptable" literally across
EVERY FREQUENCY in a decade of
frequencies.? ?3-30 MHz.? ?The
tradeoff is loss, as much as 10 db at
times.? And they generally are pricey.
?
6.? There are some
multi-band vertical antennas on the
market that are basically vertical fan
dipoles, but scrunched up in a nice
package.? ?An elderly ham in my city
has one, 32 feet tall....a gang of us
put it up and doggone it does from
from 40 meters all the way through 6
meters
?
?
And there are probably
many more....
?
Gordon
An automatic tuner
protects the rig during TX.? If
the SWR is bad during TX, some of
the signal coming out of the
transmitter is reflected by the
antenna back into the radio where
it can cause damage.
That said, RX is optimized by a
properly tuned antenna, but some
good amount of signal still makes
into the radio when receiving,
even when the antenna is not
perfect.
So I assume Doc G? is scanning for
radio traffic, and then when he
finds some if he wants to transmit
he does something about his SWR
for that frequency.
|
Way above my head, but very interested in this project.? Would be interested in something that could be supplied as a built PCB, and just needed the controls, plugs and sockets etc. connecting up, and of course boxing. Would look great added as part of the Bitx - uBitx line up.
Phil - G7BZD
On Sun, Dec 31, 2017 at 4:23 PM, K9HZ <bill@...> wrote: That was the plan from the start.? Even with its own nano I need 18 latching digital lines so ill be doing some expanding/latching/mux-ing.?
What I'm struggling with at the moment is using latching relays (expensive) vs the added current from all of the relays if they are not latching.? Not good for battery ops.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ? On Dec 31, 2017, at 7:55 AM, Jack Purdum via Groups.Io < jjpurdum@...> wrote: I agree with Rod...it should have its own Nano. The issue really isn't the processing power, but the ?BITX I/O lines are pretty scarce. Plus, you can buy the Nano for $3, so why not? Finally, it would make the software development a little easier since could be run "alone" during testing.
Jack, W8TEE
William,
Count me in.
I would be inclined to implement it it a separate case to be used
with other rigs,also.
What are your (er) current thoughts on separate Nano vs integrate
into ubitx's Nano?
Hope it has its own Nano, and does not rely on the ubitx. No problem
if not, I can simply supply a Nano and make the tuner believe it is
'talking' to the ubitx.
Maybe I will come up with a stand-alone-controller-project for your
tuner, so it can be driven with two wires, start and done.
I am interested in supporting this project.
Regards,
Rod KM6SN
On 12/29/2017 07:05 AM, K9HZ wrote:
So
after finishing up most of my projects a few days ago¡ I
really needed something to do¡ so I put on the drawing
board¡ a 100w automatic tuner that can work with the uBITx
(intended to go inside the same case actually) that provides
power, SWR, band memory for same antennas, low power tune,
bypass, etc. all in a kit form for about $30.? I¡¯m
prototyping the think now and will work on the
tuning/communications code (to integrate into the Raduino)
shortly.? I¡¯ve contacted a few of you off-channel to work
out some protocol/communication issues¡? but Stay tuned
(double play on words there)! ???
?
?
Dr.
William
J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
?
Owner
- Operator
Big
Signal Ranch ¨C K9ZC
Staunton,
Illinois
?
Owner
¨C Operator
Villa
Grand Piton ¨C J68HZ
Soufriere,
St. Lucia W.I.
Rent
it:
Like us on Facebook!
?
?
?
?
Good
pickups!
?
So
the ALE (automatic link establishment) crowd, much like the
WINLINK crowd, tend to use LOTS of bands....and thus they
find ways to make their antenna systems work on mulltiple
bands.? ?Here are some of the most popular ways:
?
1.?
?Fan Dipoles (time honored technique of tying multiple
dipoles together at the CENTER, and the energy tends to go
to the correct one, since all the others present much higher
impedances.? ?The wires "fan" out with usually wooden
spreaders at the? end and some string involved to keep them
somewhat separate.? ?Been there done that many times, my
college ham club has a 3-band unit up on the top of an 11
story building rightnow that I built for them.? ?Build for
yourself, dirt cheap.?
?
2.?
Auto-tuners? --- everyone makes these now and many can tune
as soon as they see RF, or even return to previous settings
that were memorized.? ?LDG,? and others.? ?Low power
versions for $100? ?End fed wire to balanced line fed
dipoles---they work with lots of different kinds of wire.?
?
3.?
Inherently multiband antennas:? ?example, full wavelength
loops.? ?Build for yourself.? ?
?
4.?
Carefully tuned end-fed transformer-fed antennas --- there
are now several of these on the market and they give an
acceptable SWR on mulltiple harmonically related bands.?
?Tend to be close to $100
?
5.?
(the one I dislike)? resistively terminated folded dipoles
--- these use a resistor to make up for what a folded dipole
can't create and give an SWR that is "acceptable" literally
across EVERY FREQUENCY in a decade of frequencies.? ?3-30
MHz.? ?The tradeoff is loss, as much as 10 db at times.? And
they generally are pricey.
?
6.?
There are some multi-band vertical antennas on the market
that are basically vertical fan dipoles, but scrunched up in
a nice package.? ?An elderly ham in my city has one, 32 feet
tall....a gang of us put it up and doggone it does from from
40 meters all the way through 6 meters
?
?
And
there are probably many more....
?
Gordon
An
automatic tuner protects the rig during TX.? If the SWR
is bad during TX, some of the signal coming out of the
transmitter is reflected by the antenna back into the
radio where it can cause damage.
That said, RX is optimized by a properly tuned antenna,
but some good amount of signal still makes into the
radio when receiving, even when the antenna is not
perfect.
So I assume Doc G? is scanning for radio traffic, and
then when he finds some if he wants to transmit he does
something about his SWR for that frequency.
<image001.gif>
|
Well my company will manufacture the tuner, but i will need a bunch of beta testers to work any bugs out. ?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
toggle quoted message
Show quoted text
On Dec 31, 2017, at 8:10 AM, Gordon Gibby < ggibby@...> wrote:
?If you guys make this happen, I'm going to be rather amazed.? ?Even if it merely does a clunky search search search algorithm in the beginning......
It can later do the intellituner thing with the smith chart type calculations.? ?
I'm able to actuate my MFJ 993B intellituner easily on 80 meters and usually on 40 and sometimes higher with my uBitx running just 12 volts to the finals and doing digital.? ?But that thing was about $270...........
As Ashhar pointed out....someone should form a company.? ?Crowd-fund it if you wish.? ? Get printed circuit boards.? (I even learned how to do that!)? ?think about how to make sure it works for every possible mode & application.....
For scanning systems like WINLINK, it would be wonderful if it could move to memory positions on RECEIVE (which means the VFO has to output something, or you have to use a frequency counter to watch it)
For ALE, the freuqncy changes are TOO FAST to follow with relays.
Cheers.
gordon
I agree with Rod...it should have its own Nano. The issue really isn't the processing power, but the ?BITX I/O lines are pretty scarce. Plus, you can buy the Nano for $3, so why not? Finally, it would make the
software development a little easier since could be run "alone" during testing.
Jack, W8TEE
William,
Count me in.
I would be inclined to implement it it a separate case to be used with other rigs,also.
What are your (er) current thoughts on separate Nano vs integrate into ubitx's Nano?
Hope it has its own Nano, and does not rely on the ubitx. No problem if not, I can simply supply a Nano and make the tuner believe it is 'talking' to the ubitx.
Maybe I will come up with a stand-alone-controller-project for your tuner, so it can be driven with two wires, start and done.
I am interested in supporting this project.
Regards,
Rod KM6SN
On 12/29/2017 07:05 AM, K9HZ wrote:
So after finishing up most of my projects a few days ago¡ I really needed something to do¡ so I put on the drawing board¡ a 100w automatic tuner that can work with the uBITx (intended to go
inside the same case actually) that provides power, SWR, band memory for same antennas, low power tune, bypass, etc. all in a kit form for about $30.? I¡¯m prototyping the think now and will work on the tuning/communications code (to integrate into the Raduino)
shortly.? I¡¯ve contacted a few of you off-channel to work out some protocol/communication issues¡? but Stay tuned (double play on words there)! ???
?
?
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ
?
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
?
Owner ¨C Operator
Villa Grand Piton ¨C J68HZ
Soufriere, St. Lucia W.I.
Rent it:
Like us on Facebook!
?
?
?
?
Good pickups!
?
So the ALE (automatic link establishment) crowd, much like the WINLINK crowd, tend to use LOTS of bands....and thus they find ways to make their antenna systems work on mulltiple bands.? ?Here are some of the most popular ways:
?
1.? ?Fan Dipoles (time honored technique of tying multiple dipoles together at the CENTER, and the energy tends to go to the correct one, since all the others present much higher impedances.? ?The wires "fan" out with usually wooden spreaders
at the? end and some string involved to keep them somewhat separate.? ?Been there done that many times, my college ham club has a 3-band unit up on the top of an 11 story building rightnow that I built for them.? ?Build for yourself, dirt cheap.?
?
2.? Auto-tuners? --- everyone makes these now and many can tune as soon as they see RF, or even return to previous settings that were memorized.? ?LDG,? and others.? ?Low power versions for $100? ?End fed wire to balanced line fed dipoles---they
work with lots of different kinds of wire.?
?
3.? Inherently multiband antennas:? ?example, full wavelength loops.? ?Build for yourself.? ?
?
4.? Carefully tuned end-fed transformer-fed antennas --- there are now several of these on the market and they give an acceptable SWR on mulltiple harmonically related bands.? ?Tend to be close to $100
?
5.? (the one I dislike)? resistively terminated folded dipoles --- these use a resistor to make up for what a folded dipole can't create and give an SWR that is "acceptable" literally across EVERY FREQUENCY in a decade of frequencies.? ?3-30
MHz.? ?The tradeoff is loss, as much as 10 db at times.? And they generally are pricey.
?
6.? There are some multi-band vertical antennas on the market that are basically vertical fan dipoles, but scrunched up in a nice package.? ?An elderly ham in my city has one, 32 feet tall....a gang of us put it up and doggone it does from
from 40 meters all the way through 6 meters
?
?
And there are probably many more....
?
Gordon
An automatic tuner protects the rig during TX.? If the SWR is bad during TX, some of the signal coming out of the transmitter is reflected by the antenna back into the radio where it can cause damage.
That said, RX is optimized by a properly tuned antenna, but some good amount of signal still makes into the radio when receiving, even when the antenna is not perfect.
So I assume Doc G? is scanning for radio traffic, and then when he finds some if he wants to transmit he does something about his SWR for that frequency.
|
That was the plan from the start. ?Even with its own nano I need 18 latching digital lines so ill be doing some expanding/latching/mux-ing.?
What I'm struggling with at the moment is using latching relays (expensive) vs the added current from all of the relays if they are not latching. ?Not good for battery ops.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
toggle quoted message
Show quoted text
On Dec 31, 2017, at 7:55 AM, Jack Purdum via Groups.Io < jjpurdum@...> wrote: I agree with Rod...it should have its own Nano. The issue really isn't the processing power, but the ?BITX I/O lines are pretty scarce. Plus, you can buy the Nano for $3, so why not? Finally, it would make the software development a little easier since could be run "alone" during testing.
Jack, W8TEE
William,
Count me in.
I would be inclined to implement it it a separate case to be used
with other rigs,also.
What are your (er) current thoughts on separate Nano vs integrate
into ubitx's Nano?
Hope it has its own Nano, and does not rely on the ubitx. No problem
if not, I can simply supply a Nano and make the tuner believe it is
'talking' to the ubitx.
Maybe I will come up with a stand-alone-controller-project for your
tuner, so it can be driven with two wires, start and done.
I am interested in supporting this project.
Regards,
Rod KM6SN
On 12/29/2017 07:05 AM, K9HZ wrote:
So
after finishing up most of my projects a few days ago¡ I
really needed something to do¡ so I put on the drawing
board¡ a 100w automatic tuner that can work with the uBITx
(intended to go inside the same case actually) that provides
power, SWR, band memory for same antennas, low power tune,
bypass, etc. all in a kit form for about $30.? I¡¯m
prototyping the think now and will work on the
tuning/communications code (to integrate into the Raduino)
shortly.? I¡¯ve contacted a few of you off-channel to work
out some protocol/communication issues¡? but Stay tuned
(double play on words there)! ???
?
?
Dr.
William
J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
?
Owner
- Operator
Big
Signal Ranch ¨C K9ZC
Staunton,
Illinois
?
Owner
¨C Operator
Villa
Grand Piton ¨C J68HZ
Soufriere,
St. Lucia W.I.
Rent
it:
Like us on Facebook!
?
?
?
?
Good
pickups!
?
So
the ALE (automatic link establishment) crowd, much like the
WINLINK crowd, tend to use LOTS of bands....and thus they
find ways to make their antenna systems work on mulltiple
bands.? ?Here are some of the most popular ways:
?
1.?
?Fan Dipoles (time honored technique of tying multiple
dipoles together at the CENTER, and the energy tends to go
to the correct one, since all the others present much higher
impedances.? ?The wires "fan" out with usually wooden
spreaders at the? end and some string involved to keep them
somewhat separate.? ?Been there done that many times, my
college ham club has a 3-band unit up on the top of an 11
story building rightnow that I built for them.? ?Build for
yourself, dirt cheap.?
?
2.?
Auto-tuners? --- everyone makes these now and many can tune
as soon as they see RF, or even return to previous settings
that were memorized.? ?LDG,? and others.? ?Low power
versions for $100? ?End fed wire to balanced line fed
dipoles---they work with lots of different kinds of wire.?
?
3.?
Inherently multiband antennas:? ?example, full wavelength
loops.? ?Build for yourself.? ?
?
4.?
Carefully tuned end-fed transformer-fed antennas --- there
are now several of these on the market and they give an
acceptable SWR on mulltiple harmonically related bands.?
?Tend to be close to $100
?
5.?
(the one I dislike)? resistively terminated folded dipoles
--- these use a resistor to make up for what a folded dipole
can't create and give an SWR that is "acceptable" literally
across EVERY FREQUENCY in a decade of frequencies.? ?3-30
MHz.? ?The tradeoff is loss, as much as 10 db at times.? And
they generally are pricey.
?
6.?
There are some multi-band vertical antennas on the market
that are basically vertical fan dipoles, but scrunched up in
a nice package.? ?An elderly ham in my city has one, 32 feet
tall....a gang of us put it up and doggone it does from from
40 meters all the way through 6 meters
?
?
And
there are probably many more....
?
Gordon
An
automatic tuner protects the rig during TX.? If the SWR
is bad during TX, some of the signal coming out of the
transmitter is reflected by the antenna back into the
radio where it can cause damage.
That said, RX is optimized by a properly tuned antenna,
but some good amount of signal still makes into the
radio when receiving, even when the antenna is not
perfect.
So I assume Doc G? is scanning for radio traffic, and
then when he finds some if he wants to transmit he does
something about his SWR for that frequency.
<image001.gif>
|
Yes it will be powered by a Nano and can be used stand-alone with a second Nano for display/interface (showing Power, SWR, status, etc). That way it integrates with the uBITx devices easily and any other radio or stand alone with the second Nano. Even your PC if thats what you prefer.?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it:
email:??bill@... ?
toggle quoted message
Show quoted text
On Dec 31, 2017, at 1:49 AM, Rod Self < km6sn@...> wrote:
William,
Count me in.
I would be inclined to implement it it a separate case to be used
with other rigs,also.
What are your (er) current thoughts on separate Nano vs integrate
into ubitx's Nano?
Hope it has its own Nano, and does not rely on the ubitx. No problem
if not, I can simply supply a Nano and make the tuner believe it is
'talking' to the ubitx.
Maybe I will come up with a stand-alone-controller-project for your
tuner, so it can be driven with two wires, start and done.
I am interested in supporting this project.
Regards,
Rod KM6SN
On 12/29/2017 07:05 AM, K9HZ wrote:
So
after finishing up most of my projects a few days ago¡ I
really needed something to do¡ so I put on the drawing
board¡ a 100w automatic tuner that can work with the uBITx
(intended to go inside the same case actually) that provides
power, SWR, band memory for same antennas, low power tune,
bypass, etc. all in a kit form for about $30.? I¡¯m
prototyping the think now and will work on the
tuning/communications code (to integrate into the Raduino)
shortly.? I¡¯ve contacted a few of you off-channel to work
out some protocol/communication issues¡? but Stay tuned
(double play on words there)! ???
?
?
Dr.
William
J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ
PJ2/K9HZ
?
Owner
- Operator
Big
Signal Ranch ¨C K9ZC
Staunton,
Illinois
?
Owner
¨C Operator
Villa
Grand Piton ¨C J68HZ
Soufriere,
St. Lucia W.I.
Rent
it:
Like us on Facebook!
?
?
email:?
bill@...
?
?
Good
pickups!
?
So
the ALE (automatic link establishment) crowd, much like the
WINLINK crowd, tend to use LOTS of bands....and thus they
find ways to make their antenna systems work on mulltiple
bands.? ?Here are some of the most popular ways:
?
1.?
?Fan Dipoles (time honored technique of tying multiple
dipoles together at the CENTER, and the energy tends to go
to the correct one, since all the others present much higher
impedances.? ?The wires "fan" out with usually wooden
spreaders at the? end and some string involved to keep them
somewhat separate.? ?Been there done that many times, my
college ham club has a 3-band unit up on the top of an 11
story building rightnow that I built for them.? ?Build for
yourself, dirt cheap.?
?
2.?
Auto-tuners? --- everyone makes these now and many can tune
as soon as they see RF, or even return to previous settings
that were memorized.? ?LDG,? and others.? ?Low power
versions for $100? ?End fed wire to balanced line fed
dipoles---they work with lots of different kinds of wire.?
?
3.?
Inherently multiband antennas:? ?example, full wavelength
loops.? ?Build for yourself.? ?
?
4.?
Carefully tuned end-fed transformer-fed antennas --- there
are now several of these on the market and they give an
acceptable SWR on mulltiple harmonically related bands.?
?Tend to be close to $100
?
5.?
(the one I dislike)? resistively terminated folded dipoles
--- these use a resistor to make up for what a folded dipole
can't create and give an SWR that is "acceptable" literally
across EVERY FREQUENCY in a decade of frequencies.? ?3-30
MHz.? ?The tradeoff is loss, as much as 10 db at times.? And
they generally are pricey.
?
6.?
There are some multi-band vertical antennas on the market
that are basically vertical fan dipoles, but scrunched up in
a nice package.? ?An elderly ham in my city has one, 32 feet
tall....a gang of us put it up and doggone it does from from
40 meters all the way through 6 meters
?
?
And
there are probably many more....
?
Gordon
An
automatic tuner protects the rig during TX.? If the SWR
is bad during TX, some of the signal coming out of the
transmitter is reflected by the antenna back into the
radio where it can cause damage.
That said, RX is optimized by a properly tuned antenna,
but some good amount of signal still makes into the
radio when receiving, even when the antenna is not
perfect.
So I assume Doc G? is scanning for radio traffic, and
then when he finds some if he wants to transmit he does
something about his SWR for that frequency.
|
Re: Laser cut ubitx case SVG
?Oh that looks good. I'll see about ordering one and adding it to
the plan, additionally I'm thinking of some vents above and below
the finals. I've not got time to make and sell these, but there
are plenty of hackspaces scattered around the world that can help,
as well as commerical manufacturers of course :)
?Happy new year everyone!
-Cheers, Max.
On 31/12/17 15:16, Doug W wrote:
toggle quoted message
Show quoted text
Very nice Max.
Might I suggest adding a provision for a panel mount USB extension
like this one...
I can fumble around in Inkscape but I am far from proficient at
it.
|
A dual-band transceiver - trcv005.pdf
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
|
There are several tuner projects based on Arduino.? Here is one.
You can find schematics for almost all the major vendors out there.? The setup / hardware is basically all the same.
The hardware does not seem difficult.? The L match seems to be the most common.? I would use latching relays, so it could use very low power when not tuning, like the Elecraft T1 tuner.? The magic would be in the programming of the tuning subroutines.
Marco - KG5PRT?
On Dec 31, 2017 8:42 AM, "Rod Self" < km6sn@...> wrote: Hi All,
some time ago I built a single-ended version of Farhan's tuner shown here:
It is a basic L network with binary-weighted C and L values, switchable to either Hi or Low Z.
My operational impressions:
1. It is amazingly simple to tune up to an unknown load, and
2. even when the impedance mismatch is severe, switching in another tap of L or C shows easily-readable improvement in reflected voltage, which
3. gives a useful clue as to what to switch next, and
4. it is probably not necessary to use reflected voltage and phase readings- reflected voltage is probably sufficient, and
5. it would be simple to relay drive it and use a Nano to tune it.
So, I decided that when I got around-to-it, I would? automate it with a Nano. It just has not happened yet.
Just some operational feedback.
Regards,
Rod KM6SN
|
Re: #bitx40 #parts need spec's on BITX40 capacitor C7
#bitx40
#parts
Surface mount R's and C's and transistors (such as the mmbt3904 of the uBitx)
are much cheaper than their long-legged cousins.
Here's roughly the same 0805 NP0 470pf cap over on Mouser at $6.40 for 10 (vs his $5 on Amazon)
? ??581-MM051A471JCT2A? ? (a mouser part number)
The advantage of Mouser is you know you are getting a name brand cap and have a datasheet to check other specs.
The 0805 size is one down from the original 1206 size found on the uBitx, but will solder into place easily.
Much of the DIY electronics market is at the 0805 size for surface mount parts.
I find that at comfortable size to work with, can solder them in place easily without special magnification.
The 0603's are still usable, with 0402's my old eyes and blunt instrument soldering iron start having trouble.
I'm quite sure his Amazon purchase will work fine.
Though it's worth getting a DVM with capacitance range for $10 somewhere to double check what got shipped.
When building a kit, I check all the C's and R's before soldering them in place.
? ??
? ??
(I have not tried either one, but do have a cheap $10 DVM with capacitance range that is accurate to about 20pf)
When measuring small value caps, be sure to subtract the reading you get with? just the leads hanging out there.
Jerry
toggle quoted message
Show quoted text
On Sat, Dec 30, 2017 at 09:21 pm, Gordon Gibby wrote:
wow, you got a great deal!!!? Be sure to specify the capacitance in your order!!!? ?You should have enough to go into business for yourself selling those chips!!!
?
|
Re: Crystal Filter Input and Output Impedance Measurements
Huge help!!!!!!! ? Thanks!!
Sent from my iPhone
toggle quoted message
Show quoted text
Hi Gordon,
I bought quite a few (20) of the 10MHz crystals from Tayda, currently they are 10c each (perfect for experimenting with):
I spent quite a while going through them using a couple of different methods to sort them:
The first was using Ashhar Farhan's method as shown below:
specifically page 66:
The other method was the one from the following site:
specifically the 'Crystal parameters calculator' page:
I used these for my first Bitx20 and it works really well, I have listened (I just built the receive sections) to people from many different countries on it. When I built this receiver I did not have a spectrum analyser so I used an oscilloscope and RF generator
to set up my circuits. Now I have a spectrum analyser I can look at my circuit blocks in great detail which is really interesting - I really like seeing how they all work and I can also tweak them until I am happy they are tuned exactly how I need them.
My other reason for creating this receiver (other than learning how to design each section from scratch) is learning how to use my new spectrum analyser to look at and adjust the individual circuit blocks (RF amplifiers, filters, mixers etc) - this is very
interesting and I am really enjoying learning how it works.
I hope this helps,
Kerr
|
Re: Laser cut ubitx case SVG
Very nice Max. Might I suggest adding a provision for a panel mount USB extension like this one...  I can fumble around in Inkscape but I am far from proficient at it.
|
Re: Crystal Filter Input and Output Impedance Measurements
Hi Gordon,
I bought quite a few (20) of the 10MHz crystals from Tayda, currently they are 10c each (perfect for experimenting with):
I spent quite a while going through them using a couple of different methods to sort them:
The first was using Ashhar Farhan's method as shown below:
specifically page 66:
The other method was the one from the following site:
specifically the 'Crystal parameters calculator' page:
I used these for my first Bitx20 and it works really well, I have listened (I just built the receive sections) to people from many different countries on it. When I built this receiver I did not have a spectrum analyser so I used an oscilloscope and RF generator to set up my circuits. Now I have a spectrum analyser I can look at my circuit blocks in great detail which is really interesting - I really like seeing how they all work and I can also tweak them until I am happy they are tuned exactly how I need them.
My other reason for creating this receiver (other than learning how to design each section from scratch) is learning how to use my new spectrum analyser to look at and adjust the individual circuit blocks (RF amplifiers, filters, mixers etc) - this is very interesting and I am really enjoying learning how it works.
I hope this helps,
Kerr
|
Re: ALE, WINLINK and uBitX
?I think you'll get about double the power when you double the voltage.? ?Not certain, but I think the transconductance of the device is possibly constant and so changing the voltage linearly increases the power.??
The power will still drop off at higher frequencies.
Remember the two heatsinks of the uBit are both at the same DC potential but NOT at the same AC potential
gordon
toggle quoted message
Show quoted text
On Sat, Dec 30, 2017 at 06:36 pm, Gordon Gibby wrote:
ext move will be to go up to 19 or 24 vdc on the PA.
What is the expected wattage out when you do that?
I'm beginning to suspect it'll be far more robust as a winlink device than PC ALE, but at least we now know it CAN do that.
|
Re: ALE, WINLINK and uBitX
On Sat, Dec 30, 2017 at 06:36 pm, Gordon Gibby wrote:
ext move will be to go up to 19 or 24 vdc on the PA.
What is the expected wattage out when you do that? I'm beginning to suspect it'll be far more robust as a winlink device than PC ALE, but at least we now know it CAN do that.
|
Re: Laser cut ubitx case SVG
Yep, I would seriously consider purchasing one...
--
K4OSS
Charlie Ross
toggle quoted message
Show quoted text
On Sun, Dec 31, 2017, at 09:40, tausciam@... wrote: You might think of selling those for people who don't have access to a
laser cutter. You could make a few extra bucks and make people happy at
the same time
NO2Y
|
Hi All,
some time ago I built a single-ended version of Farhan's tuner shown here:
It is a basic L network with binary-weighted C and L values, switchable to either Hi or Low Z.
My operational impressions:
1. It is amazingly simple to tune up to an unknown load, and
2. even when the impedance mismatch is severe, switching in another tap of L or C shows easily-readable improvement in reflected voltage, which
3. gives a useful clue as to what to switch next, and
4. it is probably not necessary to use reflected voltage and phase readings- reflected voltage is probably sufficient, and
5. it would be simple to relay drive it and use a Nano to tune it.
So, I decided that when I got around-to-it, I would? automate it with a Nano. It just has not happened yet.
Just some operational feedback.
Regards,
Rod KM6SN
|
Re: Laser cut ubitx case SVG
You might think of selling those for people who don't have access to a laser cutter. You could make a few extra bucks and make people happy at the same time
NO2Y
|
K9HZ