Re: 3d printable enclosures?
You can also do the same with the back
panel.? On both, I'll assume that 'lower left' means as looking at
the front of the case for the front panel, and looking at the back
of the case for the back panel.
Jim
KA9BGT
On 1/2/17 12:07 PM, Jim Noeth ka9bgt@... [BITX20]
wrote:
toggle quoted message
Show quoted text
?
If you can let me know where,
type and size of the holes you need in the panel, I'll
build a printable (.stl) file for you that matches.? If
you'll respond with something like:
round hole, d1 mm diameter, center at x, y
rectangular hole x1 mm long by y1 mm high at x, y (lower
left corner of hole)
Repeat the above for as many holes as you need, remember
all dimensions are in millimeters (if you want to use
inches, just let me know and I'll convert).? All
measurements will be taken from the lower left corner of
the panel.
Jim - KA9BGT
On 1/2/17 11:12 AM, Richard Knack ihc73scout2@...
[BITX20] wrote:
?
I have
had OpenScad on my computer since I built my 3D
printer 3 years ago (it was part of the software
download package for the printer), and I never could
make heads or tails of it. It's not very "user
friendly", in my opinion.
Rich
KC8MWG
On
Monday, January 2, 2017 12:05 PM, "Jim Noeth
ka9bgt@...
[BITX20]"
wrote:
?
There
is a piece of software called
OpenScad that is free.? With it,
you can import a .STL file
(which is what is usually
provided on Thingiverse), you
can then 'subtract' cylinders
(to make round holes) and cubes
(to make rectangular holes).?
Then from that produce a new
.STL file, run it through your
favorite slicer program, then
print it.
Jim Noeth - KA9BGT
On 1/2/17 10:45 AM, Richard
Knack ihc73scout2@...
[BITX20] wrote:
?
Out
of curiosity, does
anyone on this group
play around with CAD
software? I found a 3D
printable box on
Thingiverse ( ) that was
sized for the Bitx40
board, but it has plain,
un-drilled front and
back panels. Maybe
someone here who knows
how to use CAD software
could design a 3D
printable enclosure that
has a panel that has
openings to accommodate
the Raduino display,
antenna connector, and
other controls/jacks?
I'd do it, but I don't
know how to use CAD
software...
Rich
KC8MWG
|
Re: 3d printable enclosures?
If you can let me know where, type and
size of the holes you need in the panel, I'll build a printable
(.stl) file for you that matches.? If you'll respond with
something like:
round hole, d1 mm diameter, center at x, y
rectangular hole x1 mm long by y1 mm high at x, y (lower left
corner of hole)
Repeat the above for as many holes as you need, remember all
dimensions are in millimeters (if you want to use inches, just let
me know and I'll convert).? All measurements will be taken from
the lower left corner of the panel.
Jim - KA9BGT
On 1/2/17 11:12 AM, Richard Knack ihc73scout2@... [BITX20]
wrote:
toggle quoted message
Show quoted text
?
I have had
OpenScad on my computer since I built my 3D printer 3
years ago (it was part of the software download package
for the printer), and I never could make heads or tails
of it. It's not very "user friendly", in my opinion.
Rich
KC8MWG
On
Monday, January 2, 2017 12:05 PM, "Jim Noeth
ka9bgt@... [BITX20]"
wrote:
?
There
is a piece of software called
OpenScad that is free.? With it, you
can import a .STL file (which is
what is usually provided on
Thingiverse), you can then
'subtract' cylinders (to make round
holes) and cubes (to make
rectangular holes).? Then from that
produce a new .STL file, run it
through your favorite slicer
program, then print it.
Jim Noeth - KA9BGT
On 1/2/17 10:45 AM, Richard Knack ihc73scout2@...
[BITX20] wrote:
?
Out
of curiosity, does anyone on
this group play around with
CAD software? I found a 3D
printable box on Thingiverse
( ) that was
sized for the Bitx40 board,
but it has plain, un-drilled
front and back panels. Maybe
someone here who knows how
to use CAD software could
design a 3D printable
enclosure that has a panel
that has openings to
accommodate the Raduino
display, antenna connector,
and other controls/jacks?
I'd do it, but I don't know
how to use CAD software...
Rich
KC8MWG
|
Re: 3d printable enclosures?
That would be sweet!?
Roy? WA0YMH
On Jan 2, 2017 10:45 AM, "Richard Knack ihc73scout2@... [BITX20]" < BITX20@...> wrote:
?
Out of curiosity, does anyone on this group play around with CAD software? I found a 3D printable box on Thingiverse ( ) that was sized for the Bitx40 board, but it has plain, un-drilled front and back panels. Maybe someone here who knows how to use CAD software could design a 3D printable enclosure that has a panel that has openings to accommodate the Raduino display, antenna connector, and other controls/jacks? I'd do it, but I don't know how to use CAD software...
Rich KC8MWG
|
Re: 3d printable enclosures?
I have had OpenScad on my computer since I built my 3D printer 3 years ago (it was part of the software download package for the printer), and I never could make heads or tails of it. It's not very "user friendly", in my opinion.
Rich KC8MWG
On Monday, January 2, 2017 12:05 PM, "Jim Noeth ka9bgt@... [BITX20]" wrote:
?
There is a piece of software called
OpenScad that is free.? With it, you can import a .STL file (which
is what is usually provided on Thingiverse), you can then
'subtract' cylinders (to make round holes) and cubes (to make
rectangular holes).? Then from that produce a new .STL file, run
it through your favorite slicer program, then print it.
Jim Noeth - KA9BGT
On 1/2/17 10:45 AM, Richard Knack ihc73scout2@... [BITX20]
wrote:
?
Out
of curiosity, does anyone on this group play around with
CAD software? I found a 3D printable box on Thingiverse
( ) that was sized for the
Bitx40 board, but it has plain, un-drilled front and
back panels. Maybe someone here who knows how to use CAD
software could design a 3D printable enclosure that has
a panel that has openings to accommodate the Raduino
display, antenna connector, and other controls/jacks?
I'd do it, but I don't know how to use CAD software...
Rich
KC8MWG
|
Having a passing familiarity with the inner-workings of the FT-817, one of the problems with it is that its AGC is not well-designed.
Unlike most AGCs, the time constant appears to be different for weak signals (<S9) than above, but this has to do with the unfortunate "volts/dB" curve of the AGC control voltage: For weaker signals, it is reasonable, but for strong signals a small change in voltage = more dB. The net effect of this is that the AGC seems to be inconsistent in the manner described.
When I use my FT-817 - particularly on a busy or noisy band - I make use of the attenuator to keep the S-meter in the "lower half" (<S9). In this way, one avoids the de-facto audio compression that seems to occur when the AGC is in its upper range where the time constant - even on "slow" - is faster than what one would ever choose intentionally.
Interestingly, I've not see this AGC problem discussed much as its cause isn't immediately obvious and I have not ever seen any attempted fixes but it does explain the sometimes "heavy" sound attributed to this radio. If nothing else it can serve as a cautionary tale to someone designing their own AGC loop.
73,
Clint
KA7OEI
|
Re: 3d printable enclosures?
There is a piece of software called
OpenScad that is free.? With it, you can import a .STL file (which
is what is usually provided on Thingiverse), you can then
'subtract' cylinders (to make round holes) and cubes (to make
rectangular holes).? Then from that produce a new .STL file, run
it through your favorite slicer program, then print it.
Jim Noeth - KA9BGT
On 1/2/17 10:45 AM, Richard Knack ihc73scout2@... [BITX20]
wrote:
toggle quoted message
Show quoted text
?
Out
of curiosity, does anyone on this group play around with
CAD software? I found a 3D printable box on Thingiverse
( ) that was sized for the
Bitx40 board, but it has plain, un-drilled front and
back panels. Maybe someone here who knows how to use CAD
software could design a 3D printable enclosure that has
a panel that has openings to accommodate the Raduino
display, antenna connector, and other controls/jacks?
I'd do it, but I don't know how to use CAD software...
Rich
KC8MWG
|
Out of curiosity, does anyone on this group play around with CAD software? I found a 3D printable box on Thingiverse ( ) that was sized for the Bitx40 board, but it has plain, un-drilled front and back panels. Maybe someone here who knows how to use CAD software could design a 3D printable enclosure that has a panel that has openings to accommodate the Raduino display, antenna connector, and other controls/jacks? I'd do it, but I don't know how to use CAD software...
Rich KC8MWG
|
Mine too order date 12-25-2016
On Mon, Jan 2, 2017 at 9:22 AM, AD7LL donfrasher@... [BITX20] wrote:
?
?All Right! ? Mine as shipped a well !!!!
73 Don Frasher ? AD7LL
|
?All Right! ? Mine as shipped a well !!!!
73 Don Frasher ? AD7LL
|
Mine shipped today. Woo-hoo! Hoping it arrives before the 17th, since that is when our ham radio club meets again and I am hoping to drum up some interest in the club for homebrew projects. Looking forward to it, either way!
Rich KC8MWG
On Sunday, January 1, 2017 7:09 AM, "Carl Moser mail@... [BITX20]" wrote:
?
I just got a shipping notice from PayPal. I ordered my BITX40 on 24/12/16. Also got initial tracking info from IndiaPost. Look forward to receiving it in about 2-3 weeks!
73's from Sydney
Carl VK2XSM
Sent from my iPad
?
My experience was the same as most - I got initial tracking info from IndiaPost, but never heard again until it was on my doorstep.
Have Faith!
Tom kf7rsf
I placed my order on 12-23, and I did get a tracking # via paypal. ?However, even if I enter it directly at Indiapost, google , or elswhere, I get no info received. ? ?Has anyone else had better luck?? ?or have they not actually shipped them yet?
73 Don Frasher AD7LL
|
Re: It stopped transmitting
I tested and getting 330 ohms. ?Receive current is 100ma no signal.
Transmit is anywhere from 180 ma to almost one amp depending where RV 1 is set to
toggle quoted message
Show quoted text
On Jan 2, 2017, at 6:00 AM, Raj vu2zap@... [BITX20] < BITX20@...> wrote:
?
Bill,
While looking at the diagram again it occurred to me that if Q14 was
shorted, the power supply would get
2.2 + 10 Ohm load and that would draw almost 1 amp from a 12V power
supply.
Please check Q14 collector to emitter continuity with the power
off.
At 02/01/2017, you wrote:
?
Without speaking
On Jan 1, 2017, at 10:22 PM, Raj
vu2zap@... [BITX20]
<BITX20@...
> wrote:
?
Bill,
One question, when you switch to transmit does the current jump to 1A
when you speak into the mic or without speaking?
Raj
At 01/01/2017, you wrote:
?
- At 31/12/2016, Bill Kittilson
bill@... [BITX20]
wrote:
- >
- >
- >I managed to kill my bitx40. It was working great until I decided
to tune up the big rig. I can still receive. No power at all on transmit.
I replace the 510 transistor. Sill no output. The current does jump up to
over 1 amp when I switch to transmit.
|
Re: low power out bitx40 v3
If the gate get too much +ve bias then the IRF will conduct too much current till it blows.
Replace the final IRF and see.
73, Raj vu2zap
toggle quoted message
Show quoted text
At 02/01/2017, you wrote:
looks like I broke the transmit for my Bitx40. While adjusting the PA bias I increased the ma value probably to much. The driver Q14 not gets hot while in transmit and no temp change for Q15. The pa adjust remains at 15 ma regardless of adjustment. It adjusted before I overdrove the value. Suspect Q14 or Q15 is my problem. When I speak into the mic I get a small deflection on the watt meter - maybe 1 watt
|
looks like I broke the transmit for my Bitx40. While adjusting the PA bias I increased the ma value probably to much. The driver Q14 not gets hot while in transmit and no temp change for Q15. The pa adjust remains at 15 ma regardless of adjustment. It adjusted before I overdrove the value. Suspect Q14 or Q15 is my problem. When I speak into the mic I get a small deflection on the watt meter - maybe 1 watt
|
Re: It stopped transmitting
Bill,
While looking at the diagram again it occurred to me that if Q14 was
shorted, the power supply would get
2.2 + 10 Ohm load and that would draw almost 1 amp from a 12V power
supply.
Please check Q14 collector to emitter continuity with the power
off.
At 02/01/2017, you wrote:
toggle quoted message
Show quoted text
?
Without speaking
On Jan 1, 2017, at 10:22 PM, Raj
vu2zap@... [BITX20]
<BITX20@...
> wrote:
?
Bill,
One question, when you switch to transmit does the current jump to 1A
when you speak into the mic or without speaking?
Raj
At 01/01/2017, you wrote:
?
- At 31/12/2016, Bill Kittilson
bill@... [BITX20]
wrote:
- >
- >
- >I managed to kill my bitx40. It was working great until I decided
to tune up the big rig. I can still receive. No power at all on transmit.
I replace the 510 transistor. Sill no output. The current does jump up to
over 1 amp when I switch to transmit.
|
Re: It stopped transmitting
If the final bias adjust preset is untouched then the IRF may have
failed.
Check the voltage on the left side gate pin of IRF (facing you) it should
be a small value,
I don't have my boards with me here at the farm!
It could be the driver or predriver. Whichever is running hot when you
press the PTT!
At 02/01/2017, you wrote:
toggle quoted message
Show quoted text
?
Without speaking
On Jan 1, 2017, at 10:22 PM, Raj
vu2zap@... [BITX20]
<BITX20@...
> wrote:
?
Bill,
One question, when you switch to transmit does the current jump to 1A
when you speak into the mic or without speaking?
Raj
At 01/01/2017, you wrote:
?
- At 31/12/2016, Bill Kittilson
bill@... [BITX20]
wrote:
- >
- >
- >I managed to kill my bitx40. It was working great until I decided
to tune up the big rig. I can still receive. No power at all on transmit.
I replace the 510 transistor. Sill no output. The current does jump up to
over 1 amp when I switch to transmit.
|
Re: It stopped transmitting
toggle quoted message
Show quoted text
On Jan 1, 2017, at 10:22 PM, Raj vu2zap@... [BITX20] < BITX20@...> wrote:
?
Bill,
One question, when you switch to transmit does the current jump to 1A
when you speak into the mic or without speaking?
Raj
At 01/01/2017, you wrote:
?
- At 31/12/2016, Bill Kittilson
bill@... [BITX20]
wrote:
- >
- >
- >I managed to kill my bitx40. It was working great until I decided
to tune up the big rig. I can still receive. No power at all on transmit.
I replace the 510 transistor. Sill no output. The current does jump up to
over 1 amp when I switch to transmit.
|
From the diagram it is Red Brown Black. If your tuning movement is reverse then just interchange red and black!
73 Raj vu2zap
toggle quoted message
Show quoted text
At 02/01/2017, you wrote:
Looking from the front of the rig what are the correct pot connections - left to right.
Red Brown Black or Black Brown Red?
Thanks - Noel
|
Re: Sad reality of stock vfo
> It might be prudent to add a so called "Huff and Puff" vfo stabiliser,> originally made and published by PA0KSB , SK and later simplified by?> Hans?Summers ,G0UPL , probably on his web site.
Everything you ever wanted to know about Huff & Puff stabilisers: - there you will find a library of almost every article ever written about the Huff & Puff VFO, various projects, and links to other websites with projects.
73 Hans G0UPL
|
Re: BITX40 with QRPLabs VFO
Hi
> On my QRP-LABS DDS VFO, my correction came out to 27.010.5. So it?> was a matter of fiddling with it, and I was able to tune it in by listening to? > a known station frequency like East Cars, and calibrating the vfo so it? > sounded natural. Finally I got an on air check with my buddy cross town.? > All good. BTW I have the new corrected software on the way.
If it all works fine and you're happy with it, that's fine. But just FYI...
The 27MHz crystal in the QRP Labs Si5351A Synth kit usually oscillates between 27.003 and 27.005. I have never heard a case of it oscillating as high as 27.0105. To be absolutely correct what you would need to do is adjust the programmed IF frequency to the actual BFO frequency of your BITX40. You probably entered "IF Offset" parameter "-012,000,000" but in reality the actual BFO frequency of your BITX40 will be a kHz or more lower than that. So what you have done by setting such a high "Ref Freq" parameter (27.0105) is cancelled out the error in the IF you entered. But the cancellation will only be perfect at one particular frequency.?
It's not important - because the BITX40 only operates over a narrow frequency range anyway. I'm just saying, to really be technically perfect one should adjust the BFO frequency as well as the 27MHz Ref Freq. But I know that is not necessarily easy if you are doing it by listening to a known station frequency.
73 Hans G0UPL
|
Looking from the front of the rig what are the correct pot connections - left to right. Red Brown Black or Black Brown Red?? Thanks - Noel
|
Raj vu2zap