Page 1 of 2
At last
Posted: Wed Nov 28, 2018 2:40 pm
by G3UEQ
Pleased to report after 1.5 years, Portsdown TX working OK, now to build the PA box!!
Got to be the longest build on file!!
73
Andy G3UEQ
Re: At last
Posted: Wed Nov 28, 2018 3:59 pm
by M5TXJ
Well done Andy, got any pics?
73 Dave
Re: At last
Posted: Wed Nov 28, 2018 4:30 pm
by G3UEQ
Hi Dave
Yes, will post later, just got to do wiring to switching sockets on back panel for PA and C/o relays. Got to put on spectrum analyser tomorrow and thoroughly test, think might have small problem with LO filter.
73
Andy
Re: At last
Posted: Wed Nov 28, 2018 10:32 pm
by G3UEQ
- IMG_20181128_211512.jpg (384.78 KiB) Viewed 2949 times
Re: At last
Posted: Wed Nov 28, 2018 10:33 pm
by G3UEQ
- IMG_20181128_211630.jpg (479.13 KiB) Viewed 2949 times
Re: At last
Posted: Wed Nov 28, 2018 10:33 pm
by G3UEQ
- IMG_20181128_211655.jpg (368.11 KiB) Viewed 2949 times
Re: At last
Posted: Wed Nov 28, 2018 10:34 pm
by G3UEQ
- IMG_20181128_211849.jpg (252.2 KiB) Viewed 2949 times
Re: At last
Posted: Wed Nov 28, 2018 10:50 pm
by G3UEQ
I used two LM338 TO220 5 amp regulators to supply everything, the first one goes to 8V, then second to 5.2V, this keeps dissipation very low and of course no noise. Running the IQ board from 12v using internal regulator bolted to chassis and fitted 78S05 2A device.
Just need to wire in attenuator .
73
Andy
Re: At last
Posted: Thu Nov 29, 2018 7:59 am
by radiogareth
Nice tidy job
Gareth
Re: At last
Posted: Thu Nov 29, 2018 9:14 am
by G3UEQ
Thanks Gareth
73
Andy