Re: Micro-BITX ... Lost in post ? Possibly
And Mine J ? Red collection card in letterbox when I got home from work¡now wheres the soldering iron? ? Charlie GI4FUE ?
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From: [email protected] [mailto:[email protected]] On Behalf Of philip yates
Sent: 11 January 2018 10:39
To: [email protected]
Subject: Re: [BITX20] Micro-BITX ... Lost in post ? Possibly? And mine, just arrived Phil -G7BZD
On 11 Jan 2018, at 10:37, David Holland <g4ldt@...> wrote:
Mine arrived this morning with no updates on either India post or royal mail tracking sites!? Ordered on 9th December - In the notorious "bag" at Mumbai airport on the 15th.? So there is hope yet all you G stations waiting.? By the way my board is marked 71/1 whatever that means. David G4LDT ? On 11/01/2018 08:56, Andy Robins wrote: That's fine if you are not in the UK. But here using DHL will mean paying import charges of 20% plus about ?12 admin fee. I went with India Post and no additional charges were made. Just a warning to my fellow brits.?
?
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pic of 2 extra resistors plus 4.7 k resistor
Here is a picture of the three resistors that was
included with my uBITX kit.
?
Joe Mnson
WA4VAG
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extra resistors included with uBITX kit or partrs
?
I am just getting around to installing the Ubitx
into a case.? I got it before Christmas.? In my package of parts were
3 resistors.???One, ?the required 4.7K.? But there were
also a 2.2K with red paint on the wire leads and a 10K with black or dark purple
paint on the wire leads.?? Any ideas as to what these two resistors
could be for?
?
Thanks for any help
?
Joe Munson
WA4VAG
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Re: Bitx40 Raduino convert to uBitx Raduino
The raduino is the same across all radios. Only the firmware is different
On 11 Jan 2018 7:18 am, "Sean W7SKD" < sean.jrdalys@...> wrote: Should just need that header and a loadup of the uBitx20 software.? I have a standalone Raduino, a Bitx40v3 and a uBitx and the only difference I can see is the header and the software.
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Re: Implement a uBITX Memory Manager Program
El 10/01/18 a las 18:43, Ian Lee escribi¨®:
These are things I did not know about Arduino. If I have a chance to learn Arduino later, I will study and programming again.
If I did not know about Arduino and made you feel confused by what I was talking about, I will be careful in the future.
Don't worry, As you may noticed it's impossible to know everything about anything, so we are all students and the only smart option is keep learning. Keep learning: that's one of my motto phrases. Cheers. -- 73 CO7WT, Pavel.
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The QRP Labs kit ordering page says 5W. In fact I believe they are fine for at least 10W and this is noted on the LPF Kit page
10W is well within the specified ratings of the cores according to the original G-QRP club website article (see for PDF of the article). 10W is also well within the voltage ratings of the NP0/C0G low-loss RF capacitors used in the LPF kits.
It may be possible to push it beyond 10W. Tolerance of SWR mismatch would be reduced (and eventually disappear). Another factor is component tolerances and winding differences resulting in variation in inductance values. If the filter starts producing attenuation at frequencies lower than it should... i.e. at the transmit frequency - then remember that attenuation means reduction in output power. The reduced power has to go *somewhere* and in fact it is likely to be largely dissipated as heat in the LPF components.?
I'm not sure how far beyond 10W would be Ok before generating smoke. Anyone who has these QRP Labs 7-element (3 inductors, 4 capacitors) filters on their tiny 1.5 x 0.5 inches board (37 x 13mm) would intuitively not think it right to put 100W through it. Even if everything measured perfectly I wouldn't want to go anywhere near 100W!
A confession... during PA development of the QRP Labs 5W HF PA kit (Class C) , I did put 30W continuous keyed through a QRP Labs LPF kit... No smoke ;-)
73 Hans G0UPL? ?
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Raduino 2.02 VFO A/B mode memory
Hi All
Having just upgraded my Bitx40? Raduino?to v2.02? along?with the mods to the board, I?find that? VFO A and B retain the mode in use on the display but not in tx/rx.? The reason for using it like this is that I like to
listen to the HF Aero around 6.5 Mhz USB? ( Mumbai Radio on 6.6601 coming into the UK quite well this afternoon ). As I have 7mhz LSB on VFO A and? 6mhz USB on VFO B it would be good to switch between A and B with a single press of the function button without
going through the modes as well. So is this a bug in the software or hasn't the problem arisen until now ? As I am not a programmer I would't know where to start?but able to alter lines of code as instructed and upload to the Arduino, any help or advice would
be appreciated.
I have to say a huge thank you to Allard and all the other software experimenters for their input to the project and Ashhar for the hardware design including the new uBitx multiband which I have as well but not yet in
its final home ( see attached pictures)?. It has generated a great deal of ham radio fun and learning for me.
Peter G4NJJ
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Re: uBitx receive working...transmit debugging help needed
That would only tell you if the spare contact is working. ?A failing relay might have no switching action on one set of contacts or all of them.
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On Jan 11, 2018, at 9:58 AM, Mvs Sarma < mvssarma@...> wrote:
Perhaps , difficult to know whether relays are working .
?Can we have a small led on the relay drive circuit to indicate atleast drive status of the relay. Whether it is operating or not has to be seen .
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Thanks'
Have you a link to the thread?
I'm one of the ones building a PA based on the work of WA2EBY.)
Alan
On 11/01/2018 18:16, K9HZ wrote:
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My comment is in regards to discussion in his group.?
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 Jan 11, 2018, at 11:31 AM, Alan de G1FXB via Groups.Io < g1fxb@...>
wrote:
While I acknowledge the discussion is regarding choice of
toroids for an AMU project.
QRP Labs / Hans, Points out that his LPF design is suitable UP
TO 5 watts as supplied in his kits.
See bottom section of the web page
Alan
On 11/01/2018 17:05, K9HZ wrote:
Not sure what brought this on but the teaching point of my
post for those who would otherwise make current, voltage,
saturation calculations for Inductors in RF service and
build from them is to prototype first. ?My recollection in
relation to Hans Summers LPF kits (nothing to do with my
tuner design) is that guys are using them in amplifiers up
to 100 watts... and i wonder if they have had the parts on
the bench to really see the limitations of the filters.
?More clear?
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 Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io
< nd6t_6@...>
wrote:
Bill, Before you get too invested in small toroids
consider that the tuner must deal with higher currents
than an LPF. Saturation results from current, not power.
100 watts and high impedance ratios requires larger
cores. Best to do the math before ordering. 73, ND6T
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Re: uBITX Display Separation Cable
Great documentary. See Netflix.
James
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Re: uBitx receive working...transmit debugging help needed
Ok, great. ?Next, you might check the polarity on that electret microphone. ?If you didn't build it yourself from the supplied parts check it anyway. ?Make sure the + terminal of the mic goes to the mic wire and not ground. ?I've had several hand mic's that I've repurposed not work because the electret element got wired backwards at the factory and QC didn't catch the mistake. ?If it's backwards the output of the element will be very low if you get any output at all.
Jim
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On Jan 11, 2018, at 12:05 PM, Sean W7SKD < sean.jrdalys@...> wrote: Jim - thank you - I validated the antenna wiring and it appears good.? I'm also seeing good output on CW (as opposed to SSB voice), so I think that proves out the antenna connection.
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No It looks like i need to refrain from posting and just direct you-all to my website now when the kit is complete.?
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@... ?
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On Jan 11, 2018, at 12:11 PM, Jerry Gaffke via Groups.Io < jgaffke@...> wrote: Perhaps you are thinking of this SWR Bridge? It is apparently good for up to 100W, intermittent use. On Thu, Jan 11, 2018 at 09:05 am, K9HZ wrote:
My recollection in relation to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts...
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My comment is in regards to discussion in his group.?
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@... ?
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On Jan 11, 2018, at 11:31 AM, Alan de G1FXB via Groups.Io < g1fxb@...> wrote:
While I acknowledge the discussion is regarding choice of toroids
for an AMU project.
QRP Labs / Hans, Points out that his LPF design is suitable UP TO 5
watts as supplied in his kits.
See bottom section of the web page
Alan
On 11/01/2018 17:05, K9HZ wrote:
Not sure what brought this on but the teaching point of my post
for those who would otherwise make current, voltage, saturation
calculations for Inductors in RF service and build from them is to
prototype first. ?My recollection in relation to Hans Summers LPF
kits (nothing to do with my tuner design) is that guys are using
them in amplifiers up to 100 watts... and i wonder if they have
had the parts on the bench to really see the limitations of the
filters. ?More clear?
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 Jan 11, 2018, at 8:09 AM, Don Cantrell via Groups.Io < nd6t_6@...>
wrote:
Bill, Before you get too invested in small toroids consider
that the tuner must deal with higher currents than an LPF.
Saturation results from current, not power. 100 watts and high
impedance ratios requires larger cores. Best to do the math
before ordering. 73, ND6T
|
This SWR birdge:
? ?
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On Thu, Jan 11, 2018 at 10:11 am, Jerry Gaffke wrote:
Perhaps you are thinking of this SWR Bridge?
It is apparently good for up to 100W, intermittent use.
|
Perhaps you are thinking of this SWR Bridge?
It is apparently good for up to 100W, intermittent use.
toggle quoted message
Show quoted text
On Thu, Jan 11, 2018 at 09:05 am, K9HZ wrote:
My recollection in relation to Hans Summers LPF kits (nothing to do with my tuner design) is that guys are using them in amplifiers up to 100 watts...
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Re: uBitx receive working...transmit debugging help needed
Jim - thank you - I validated the antenna wiring and it appears good.? I'm also seeing good output on CW (as opposed to SSB voice), so I think that proves out the antenna connection.
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Re: uBitx receive working...transmit debugging help needed
Further update...I dont have a telegraph key, but I used a jumper to (momentarily) ground the cw key connector.? I got cw tone in the speaker AND over 5 watts output indicated on the MFJ meter.??
Is it safe to say that its more likely I'm having a problem with the microphone than the relays?? CW output appears to travel across the same relays as SSB voice.? I have an oscilloscope and multimeter...is there a simple test I could do to see if I have a bad microphone element?
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Re: uBitx receive working...transmit debugging help needed
Perhaps , difficult to know whether relays are working .
?Can we have a small led on the relay drive circuit to indicate atleast drive status of the relay. Whether it is operating or not has to be seen . if a spare contact would be there it could light up an LED. regards
?sarma
?vu3zmv
On Thu, Jan 11, 2018 at 7:53 PM, Jim Sheldon <w0eb@...> wrote: Make sure you have the black wire on the antenna connected to ground and NOT the brown one.? Also make sure that the RF output plug is wired properly so that the black wire actually does go to the ground side of the header plug.
Jim - W0EB
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Re: AE7EU Top Level PCB Mod
Yes, that is the
application note on the Max part.? That is what they designed
the part for.
I followed its
suggestions for settings.? There are several capacitors to
pick.? The main thing is to turn it down, do not overdrive
Bit.? Sp I put the 2K pot on the final output.
AND this lead to yet
another PCB project.?? In BitX I have a PTT board.? It has a
comparitor that senses the small current (a few ma.)? when the
PTT is pushed.? The PTT is just connected to the Max PCB,
connecting it to 5V.
So now I only have 3
wires going to Mic.... Gnd, Mic, +5V.? I can use a cheap 3.5mm
stereo cable from 99 cent store.? I have experimented with
this board and a couple FETs for Pop reduction.? One FET turns
on fast and off slow to mute the LM380.
The other one times
the relay to have it actuate while mute is active.?? Then
there is an inverter that give an +5V to Raduino to be
complient with Allard's PTT signal.
There are 6 3D Printed
ABS parts to the Microphone.? Worked out better than I
expected!
73's
Mike, WA6ISP
On 1/11/2018 9:35 AM, Dave Bottom
wrote:
The MAX9814 Chip.
As commented the gain should be set between the second and
third stage not after to prevent to reduce noise and the chip
has a very well filtered BIAS supply for the Electret Mic so
they are doing everything to make it quiet. .? This works well
with Cell Phones to clear background noise.? We'll see how it
turns out here, but I am using a boom Mic headset with really
good acoustic noise cancellation.? 85 db on train isn't heard
and my F250 Diesel Truck isn't heard either while mobile.?
Drive from audio needs to match levels in the Balanced
Modulator or there will be distortion.? As I said we'll see
how it works here.??
BTW - Nice job on your hand Mic Mike!
Dave WI6R
--
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID "MotDog@..."
Mike@...
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Re: AE7EU Top Level PCB Mod
The MAX9814 Chip.
As commented the gain should be set between the second and third stage not after to prevent to reduce noise and the chip has a very well filtered BIAS supply for the Electret Mic so they are doing everything to make it quiet. .? This works well with Cell Phones to clear background noise.? We'll see how it turns out here, but I am using a boom Mic headset with really good acoustic noise cancellation.? 85 db on train isn't heard and my F250 Diesel Truck isn't heard either while mobile.? Drive from audio needs to match levels in the Balanced Modulator or there will be distortion.? As I said we'll see how it works here.??
BTW - Nice job on your hand Mic Mike!
Dave WI6R
On Thu, Jan 11, 2018 at 7:44 AM, Diver Martin <diver.martin@...> wrote: Dave,
Can you point me towards which chip/board you're going to try out?
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Charlie Morrison
Alan de G1FXB
Jim Sheldon
K9HZ