Re: Vertical SMA Tight Fit
Why not using a MCX connector + MCX to BNC pigtail?
(See attachments)
73 de Frank PH2M
Op 20-10-2017 om 20:41 schreef JT Croteau:
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See attached.
I don't know if there are lower profile SMA connectors out there but I
am hoping this works with that LPF sticking out slightly.
N1ESE
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Deze e-mail is gecontroleerd op virussen door AVG.
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Re: Vertical SMA Tight Fit
I ran into the same issue. Ended up cutting the end of my pigtail and put a SMA to BNC panel mount connector on the back end of my case and soldering the coax directly to the board.?
Jesse KJ6JRG
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On Oct 20, 2017, at 11:44, Hans Summers < hans.summers@...> wrote: Should work... you could also take a circular file and carve out a little notch in the side of the 80m LPF so it gives some space for the SMA .?
73 Hans G0UPL? ?
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Re: Vertical SMA Tight Fit
Should work... you could also take a circular file and carve out a little notch in the side of the 80m LPF so it gives some space for the SMA .?
73 Hans G0UPL? ?
On Oct 20, 2017 21:41, "JT Croteau" < jt.tobit@...> wrote: See attached.
I don't know if there are lower profile SMA connectors out there but I
am hoping this works with that LPF sticking out slightly.
N1ESE
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Re: RD16HHF1 5Watt PA
#chat
On Fri, Oct 20, 2017 at 10:45 am, Andrew Lenton wrote:
RD16HHF1
Hi Andrew Try the search function of the forum with RD16HHF1 (I think people are forgetting this). Jan
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Re: RD16HHF1 5Watt PA
#chat
I'm using one and have been very happy with it. I sourced mine from ThePartsPlace from k5nwa; here's their page:??price/shipping is reasonable.?
I run it usually with 2W output and it seems to me in transmit the total draw in on the order of ~800-900mA. I biased it using the "zero bias" method, but I can't remember if there was any difference between it and the IRF510.?
Good luck!
73
Al Holt
WD4AH
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Hi Hans- Another great kit. I found however:-
a) Assume Scematic is correct
b) BOM is correct
c) Layout and component overlay doesn't agree with schematic, in that R19 and R29 are reversed
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Progrock accuracy as 10 Mhz disciplinned osc.
Hello Joel As long as the 'window' of freq correction is 1-5 the signal is stable and clean for long stretches of time... the mean frequency is abt 2-3 Hz lower than a 10 Mhz from a 'real' GPSDO.
when you set the 'window' to 0 then the frequency is corrected every second (by a minute amount...) which makes it difficult to measure on a spectrum analyzer with a 0.3 Hz RBW.
looking on a XY display (Lissajoue) and comparing the '10 Mhz' from a GPSDO to the '10 Mhz' from the Progrock shows a difference, the Progrock being lower by 2-3 Hz (and sometimes 5Hz).
Hopefully I managed to make myself clearer...
??????????????????? de Joe 4Z7JBA
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Hi Joe, I¡¯m not sure if we are talking about the same thing or not, but my ProgRock GPS 10Mhz reference oscillator pulses on the scope. It seems that the power supply I use has a effect on this pulsing output. Switching supplies seem to cause the problem while battery supply works great. I¡¯m still not sure how accurate it is, but it seems pretty good.
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On Oct 20, 2017, at 7:22 AM, josephlevy via Groups.Io < josephlevy@...> wrote: Hello Hans
It is more complicated to get a stable and meaningful trace on a SA with the output 'jumping' every second but comparing the? XY trace on a scope shows a 2-3 Hz (and sometimes as much as 5 Hz) difference (the Progrock being lower freq. than the GPSDO 10 Mhz).
??????????????????????? de Joe. 4Z7JBA.
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Hello Hans
It is more complicated to get a stable and meaningful trace on a SA with the output 'jumping' every second but comparing the? XY trace on a scope shows a 2-3 Hz (and sometimes as much as 5 Hz) difference (the Progrock being lower freq. than the GPSDO 10 Mhz).
??????????????????????? de Joe. 4Z7JBA.
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Re: 20m QCX - output power issue
I have seen it on a 17m yota model that had the shorted Q6. Perhaps not everybody reporting this while running it with a broken transistor?
Could it be a undefined DC voltage on Q5 drain that somehow starts the drain-source diode conducting when a fast rising RF pulse comes along? If so, a solution could be a high value resistor from Q5 drain to +12V to keep it away from negative voltages.
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Hammond 29830PSLA die cast - probably another perfect QCX enclosure?
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Hi,
I think this is as expected.?
Please set the correction window threshold to zero and try again. It should narrow the green line and centre it on the red one.?
73 Hans G0UPL
On Thu, Oct 19, 2017 at 7:00 PM, josephlevy via Groups.Io <josephlevy@...> wrote: Hello Hans.
Here is a screen capture from a SA of a 10 dbe the precis Mhz from a GPSDO and the measurment from the progrock (its SW ver 1.0) and the window for correction is 1.
Is it what should bede Joe. expected?
TIA
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Re: QCX 40 sidetone issue
Ok, I was planning to replace Q6 and have it on hand.? I will set auto space to off.
thanks for your help!
Paul
From: Hans Summers <hans.summers@...>
To: [email protected]
Sent: Friday, October 20, 2017 7:37 AM
Subject: Re: [QRPLabs] QCX 40 sidetone issue
Hi Paul
Perhaps there are two possible causes.?
Firstly, check menu "4.5 Auto Space" and make sure it is Off. That feature didn't work in version 1.00b but is fixed in version 1.00c.?
Secondly, it is possible that you have the issue with Q6 and/or C33 oscillations, which others have also been discussing here. Subsequent kit batches have used MPS751 which seems to avoid the issue. You can also try replacing C33 with a lower value capacitance.?
73 Hans G0UPL
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Re: No. 195 up and running on 40
On Fri, 2017-10-20 at 05:03 -0700, Philip Thompson wrote: Thanks Peter I'll make a note of that..
Never really got into CW exept for getting past the test for my full
licence many many moons ago.
Long story short, over the past three years I've had a couple of mini
strokes and my short term memory
is shot to pieces. Hence, I will never be able to head read CW as I
wil forget what went a couple of letters before :)
However, I'm determined to try and so far, I can read 85% up to about
15WPM if I write it down. I operate almost 100% on CW and I still write everything down :-) I'm happiest at ~16 WPM but can go faster if pushed and the other operator is sending good CW. Only now am I starting to be able to read simple QSOs in my head, and I've been using CW consistently since I passed my test ! PeterO G0DZB
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Re: QCX 40 sidetone issue
Hi Paul
Perhaps there are two possible causes.?
Firstly, check menu "4.5 Auto Space" and make sure it is Off. That feature didn't work in version 1.00b but is fixed in version 1.00c.?
Secondly, it is possible that you have the issue with Q6 and/or C33 oscillations, which others have also been discussing here. Subsequent kit batches have used MPS751 which seems to avoid the issue. You can also try replacing C33 with a lower value capacitance.?
73 Hans G0UPL
On Fri, Oct 20, 2017 at 3:33 PM, Paul Schumacher via Groups.Io <wnpauls@...> wrote: It works well if I switch it to the cw practice, without rf output.? I
get about 3.3 watts out at 11.8 volts in.? with rf output, the display dims slightly.
Paul
Hi Paul
What firmware version do you have? There were a few issues with the sidetone and messages functionality. These were resolved in version 1.00b.?
73 Hans G0UPL
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Re: QCX 40 sidetone issue
It works well if I switch it to the cw practice, without rf output.? I
get about 3.3 watts out at 11.8 volts in.? with rf output, the display dims slightly.
Paul
From: Hans Summers <hans.summers@...>
To: [email protected]
Sent: Friday, October 20, 2017 7:10 AM
Subject: Re: [QRPLabs] QCX 40 sidetone issue
Hi Paul
What firmware version do you have? There were a few issues with the sidetone and messages functionality. These were resolved in version 1.00b.?
73 Hans G0UPL
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Re: QCX 40 sidetone issue
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From: Hans Summers <hans.summers@...>
To: [email protected]
Sent: Friday, October 20, 2017 7:10 AM
Subject: Re: [QRPLabs] QCX 40 sidetone issue
Hi Paul
What firmware version do you have? There were a few issues with the sidetone and messages functionality. These were resolved in version 1.00b.?
73 Hans G0UPL
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Re: QCX 40 sidetone issue
Hi Paul
What firmware version do you have? There were a few issues with the sidetone and messages functionality. These were resolved in version 1.00b.?
73 Hans G0UPL
On Thu, Oct 19, 2017 at 8:55 PM, Paul Schumacher via Groups.Io <wnpauls@...> wrote: I completed, aligned and tested my unit and everything seemed fine. When I keyed it, the sidetone sounded clear and did not miss anything.
On the air, the signal was clean and easy to copy, monitored on a remote station.
I set up the memories, and now keying from the memories, the dits are broken up or partially missing at time.? Likewise keying from a straight key or the micro
switch, the sidetone is also broken up at time.
any suggestions are welcome.
thanks,
Paul K0ZYV
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Re: No. 195 up and running on 40
Thanks Peter I'll make a note of that..
Never really got into CW exept for getting past the test for my full licence many many moons ago.
Long story short, over the past three years I've had a couple of mini strokes and my short term memory
is shot to pieces. Hence, I will never be able to head read CW as I wil forget what went a couple of letters before :)
However, I'm determined to try and so far, I can read 85% up to about 15WPM if I write it down.
This new rig that Hans has blessed us with has given me a further boost to get on with CW operating..
Hope to see you on air...
Phil G4JVF
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Re: 20m QCX - output power issue
Hi Olgierd
Yes, reducing C33 to 180pF will reduce the gain a bit. But there is plenty of gain anyway; and if it is the only way to stop the oscillation then it would be a good tradeoff...?
I am still not sure why a few people seem to have this problem but most do not.?
73 Hans G0UPL
On Fri, Oct 20, 2017 at 2:48 PM, <opilarczyk@...> wrote: Hi Hans,
I tried adding 680pF SMD cap underneath C34 (something about capacitor inductance), but it didn't really change the behavior. I got two replacements for the dead Q6 (2SA-1315 and 2SB-892), will check with those.
1nF cap impedance is about 11 ohms @ 14 MHz, 180pF @ 14 MHz is 63 Ohms - wouldn't that reduce gain of the receiver?
73 Olgierd SQ3SWF
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Frank PH2M
Joel Caulkins/N6ALT
Daniel Ekman SA2KNG