been watching your vids, great work , re the above trx . is the T/R switch just that ? switches between tx and rx only . does it not have a freq offset for tx/rx? your vids have inspired me to go qrpp this summer . forgive my ignorance , does the 2 parrallel xtals enable the freq sweep you have and would this be lost just using 1 xtal ? I ask because i stuck a variable cap on a pixie and only got minimal swing from 1 xtal ..
@m0jhaqrp 1. T/R: Yes only switches supply and antenna. Offset is manual. 2. VXO: 2 parallel xtals helps increases shift. But you also need inductor in series with crystal - try values between 10 - 33 uH to greatly increase shift.
Can you please tell me what the values are for the variable caps? Were does the 10 pf cap from pin six of the ne602 go to? Is there a printable schematic somewhere?
Thank you for your video. It is an inspiration especially for a new ham. The circuit at the end of the video is a little confusing mainly the first oscillator stage and also the audio out pin for the NE602. Is that really a functional circuit or are you just using that for illustration?
Peter, I wish I had the ability to make these lil QRP Rigs. I have a FT-817nd which of course is nice, but Id love that just litterally throw in a pack and go. Very neat and well done
been watching your vids, great work , re the above trx . is the T/R switch just that ? switches between tx and rx only . does it not have a freq offset for tx/rx? your vids have inspired me to go qrpp this summer . forgive my ignorance , does the 2 parrallel xtals enable the freq sweep you have and would this be lost just using 1 xtal ? I ask because i stuck a variable cap on a pixie and only got minimal swing from 1 xtal ..
m0jhaqrp 1 week ago
@m0jhaqrp 1. T/R: Yes only switches supply and antenna. Offset is manual. 2. VXO: 2 parallel xtals helps increases shift. But you also need inductor in series with crystal - try values between 10 - 33 uH to greatly increase shift.
vk3ye 1 week ago
wowwww incredible it's fantastic !! 73 de IT9BDM
buddabi133 2 weeks ago
Hi,
Thanks for this; my cup of tea.
Can you please tell me what the values are for the variable caps? Were does the 10 pf cap from pin six of the ne602 go to? Is there a printable schematic somewhere?
73 KE7SLX
determinist48 2 weeks ago
@determinist48 1. It goes to the base of the 2N3053 via another 10pF. 2. This is the only diagram available.
vk3ye 2 weeks ago
awsome, good job
pp5cw 1 month ago
Thank you for your video. It is an inspiration especially for a new ham. The circuit at the end of the video is a little confusing mainly the first oscillator stage and also the audio out pin for the NE602. Is that really a functional circuit or are you just using that for illustration?
ObamaTaliban 2 months ago
@ObamaTaliban it's a real circuit. Try full screen for a better view. Pin 5 of NE602 is audio out. Pin 6 is oscillator in from base of 2N3053.
vk3ye 2 weeks ago
Great Project FB OM
st2nh 2 months ago
GREAT homebrewing! Your channel is very enjoyable. 73, Jack WA6KYO
TechDemos 2 months ago
where can i buy this thing...???
wht s the price??
CYLing90 4 months ago
@CYLing90 Some things are priceless and can't be bought ;) Idea is you build it (or similar) and learn!
vk3ye 2 weeks ago
I really liked the video
reese1011 5 months ago
Comment removed
hfradionut 6 months ago
Is this from a kit? If so, what kind (Pixieii, etc)?
pickaninnyjenny 6 months ago
Vy cool, Peter. This would make a great kit that could be shipped in the food container!!
Your site requires a daily visit, thanks!!!
73
Herb/WR9H
monarchham 7 months ago
Well done. You always have some of the coolest stuff on your site.
73,
Rich
KE7AK
rvisokey 7 months ago
Peter, I wish I had the ability to make these lil QRP Rigs. I have a FT-817nd which of course is nice, but Id love that just litterally throw in a pack and go. Very neat and well done
Ron
KB3VEW
ThePauperPrepper 7 months ago
You come up with some fabulous!! stuff. Nice work!!.
TheKC1ML 7 months ago
Hi Peter,
Good to work you QRPp this morning. Your signals RST 519-549 QSB & chirp. Thanks for posting this video - it's good to see the rig behind the QSO!
73,
Mike VK2IG/QRP
vk2ig 7 months ago