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QCXmini - do I miss Q5 on my board ? 9 messages
#parts
#qcxmini
#missing
Mike You are very correct about the threshold. After looking at circuit, with the RF 'filter' cap at the gate of Q5 and the fact that the gate is being driven by the ATMega328 voltages (5V) as a Read/
Mike You are very correct about the threshold. After looking at circuit, with the RF 'filter' cap at the gate of Q5 and the fact that the gate is being driven by the ATMega328 voltages (5V) as a Read/
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Steve KA6PRW
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Broken L4 Toroid- can it be glued? 7 messages
#parts
#problem
Ferrite cores and iron dust cores are not the same material. Ferrite cores are not normally coated with a colour, iron dust are coated with a colour to show the mix.
Ferrite cores and iron dust cores are not the same material. Ferrite cores are not normally coated with a colour, iron dust are coated with a colour to show the mix.
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geoff M0ORE
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Transformer & Inductor Wire Gauges 4 messages
#qcx
#qcx40
#40m
#parts
#manual
Thank you so much for the timely guidance. I would have responded sooner but I was busy winding coils! I am happy to report all went smoothly. Wonderful to be part of this great community. Best health
Thank you so much for the timely guidance. I would have responded sooner but I was busy winding coils! I am happy to report all went smoothly. Wonderful to be part of this great community. Best health
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KC2UOK@...
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missing parts.... 23 messages
#parts
Sorry to tell you Shanon, but Murphy normally arrives even before you do yourself ....
Sorry to tell you Shanon, but Murphy normally arrives even before you do yourself ....
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Erwin - PE3ES - F4VTQ
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missing parts 2 messages
#40m
#parts
Syd, your first point of contact should be Hans. You'll find him very helpful.
Syd, your first point of contact should be Hans. You'll find him very helpful.
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Gary Bernard
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Building a 40 meter QCX for someone else, missing, and extra parts... 4 messages
#qcx
#parts
#40m
By the way, replacing 16V capacitors with 25V parts is acceptable and common as long as the remaining specs (size, tolerance, temp range, ESR) are still met. 73, Paul K2AYZ
By the way, replacing 16V capacitors with 25V parts is acceptable and common as long as the remaining specs (size, tolerance, temp range, ESR) are still met. 73, Paul K2AYZ
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By
Paul Galburt - K2AYZ
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Cap Tester 12 messages
#parts
DIY WORKBENCH: http://www.n5ese.com/capac_ckr.htm http://www.n5ese.com/l-meter.htm http://www.n5ese.com/rfprobe2.htm https://www.brighthubengineering.com/diy-electronics-devices/73675-build-at-home-an
DIY WORKBENCH: http://www.n5ese.com/capac_ckr.htm http://www.n5ese.com/l-meter.htm http://www.n5ese.com/rfprobe2.htm https://www.brighthubengineering.com/diy-electronics-devices/73675-build-at-home-an
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Arv Evans
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Broken R36 B5K 5K Logarithmic potentiometer 10 messages
#parts
Hi all I do hear of broken potentiometers sometimes. The exposed tabs made from SRPB material are probably not exactly easily broken, but certainly more easy than the other components in the kit. I do
Hi all I do hear of broken potentiometers sometimes. The exposed tabs made from SRPB material are probably not exactly easily broken, but certainly more easy than the other components in the kit. I do
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Hans Summers
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LM7805 Replacement 22 messages
#qcx
#parts
Hi all, Been away from this thread, the QCX and amateur radio for a few months due to some personal issues which have cleared up a bit now thank goodness. Glad to see this thread is still going on and
Hi all, Been away from this thread, the QCX and amateur radio for a few months due to some personal issues which have cleared up a bit now thank goodness. Glad to see this thread is still going on and
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By
...
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WA2T QCX Case 33 messages
#qcx
#case
#encl
#parts
Vince, See the link I provided in my reply to Kees, assuming you want the case I used. 73!
Vince, See the link I provided in my reply to Kees, assuming you want the case I used. 73!
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By
rentwist@...
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C1 Trimmer 6 messages
#parts
#qcx
I just thought you might look through some of them to see if you could find what you needed, like eBay #152215440586, which might work. Jack, W8TEE
I just thought you might look through some of them to see if you could find what you needed, like eBay #152215440586, which might work. Jack, W8TEE
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By
jjpurdum
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Are these LPF capacitors out of spec? 19 messages
#qcx
#lpf
#parts
Great News ! an excuse if needed, to buy a piece of accurate test equipment & get a world beater of a TRX thrown in for free.... Alan
Great News ! an excuse if needed, to buy a piece of accurate test equipment & get a world beater of a TRX thrown in for free.... Alan
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Alan de G1FXB
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Diodes 7 messages
#parts
Thanks very much to All! I'll be chewing on this for a while. Thanks, Bill K0WHW
Thanks very much to All! I'll be chewing on this for a while. Thanks, Bill K0WHW
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Bill Watkins
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#parts 2 messages
#parts
Gilles, I think you will need to make the BPFs very broad. 1-30MHz is a lot to cover with only 5(?) BPFs. Any soundcard will do if you use the polyphase output, it is amplified and only low frequency.
Gilles, I think you will need to make the BPFs very broad. 1-30MHz is a lot to cover with only 5(?) BPFs. Any soundcard will do if you use the polyphase output, it is amplified and only low frequency.
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Alan G4ZFQ
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#parts Where does D2 get 5v from? 3 messages
#parts
I am in the process of soldering my QCX, trying to keep solder bridges from forming, no smoke yet. But I noticed both of them should get 5v, and I wasnt sure if a solder bridge was ok or not. I will c
I am in the process of soldering my QCX, trying to keep solder bridges from forming, no smoke yet. But I noticed both of them should get 5v, and I wasnt sure if a solder bridge was ok or not. I will c
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By
Ed Beckerich
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QCX Case
#case
#parts
I've just finished some knobs to replace the stock knobs in cases which I print. Anyone who has one of my cases and wants Knobs like the ones shown in the attached picture. Contact me off list and I'l
I've just finished some knobs to replace the stock knobs in cases which I print. Anyone who has one of my cases and wants Knobs like the ones shown in the attached picture. Contact me off list and I'l
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Old Dog
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Volume gain control 5 messages
#parts
Hi a squirt of switch cleaner may help if the pot has an opening brought back to life a few very old but pots that way just a suggestion. Barry
Hi a squirt of switch cleaner may help if the pot has an opening brought back to life a few very old but pots that way just a suggestion. Barry
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By
Barry Mayson
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OT: RE: out of specification operation with Si4721 for use on 4 Meters 5 messages
#parts
10 of the Si570 or 10 of th Si4721? -Justin N2TOH
10 of the Si570 or 10 of th Si4721? -Justin N2TOH
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By
freefuel@...
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