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Can any member identify these PCB,s ?

Posted: Tue Jul 23, 2019 5:01 pm
by G4GUG
Can any member identify these PCB,s ?

Possibly Wood and Douglas ? ;)

73 Mike G4GUG Stroud, Gloucestershire.
unknown pcb's.JPG
unknown pcb's.JPG (91.76 KiB) Viewed 1258 times

Re: Can any member identify these PCB,s ?

Posted: Wed Jul 24, 2019 6:02 pm
by G3GJA
That's a Solent 23cm analogue FM ATV transmitter.

Capable of 1w or a bit more with tweaking. Free running VCO at 23cm but synthesizers were available, the original multi-channel using a CB radio sysnth chip and the other Worthing offering was based on a Plessey SP5055 and gave a single channel from a xtal multiplied by 256.

Originally offered as a kit by G8CMQ (?) in the 80s, it was taken on by the Worthing ATV Repeater group so it's also known as a 'Worthing'

Your PCB may be home made as most I saw were tinned, not bare copper

Looks like someone as added a PA. The usual method was to add a Mitsubishi M57762 brick and that could give 18 to 20w out.

If it has a M57762 its worth hanging on to as it can produce 4w of DATV with shoulders more than -40 dBc.

The small box may be a preamp for 23cm but I don't recognise it.

Clive G3GJA / G8EQZ

Re: Can any member identify these PCB,s ?

Posted: Thu Jul 25, 2019 4:33 am
by G4GUG
Thanks Clive.
I have responded with an email to you.
Thanks identifying the pcb's.
73 Mike G4GUG.
Stroud Gloucestershire.

Re: Can any member identify these PCB,s ?

Posted: Thu Jul 25, 2019 5:55 am
by M0SKM
If any use to you there is a Solent schematic in the BATC Wiki.

https://wiki.batc.org.uk/Solent_ATV_units

Steve

Re: Can any member identify these PCB,s ?

Posted: Thu Jul 25, 2019 10:14 am
by G7JTT
The preamp looks familiar to something I knocked up for my Solent back in the day will look when I get home and see if I have any info.

All best John G7JTT

Re: Can any member identify these PCB,s ?

Posted: Fri Aug 09, 2019 12:41 pm
by G4GUG
Gentlemen,Thanks for replies,
With schematic now downloaded
Feel more confident about applying a power supply.
Sorry for delay in responding.
Away on holidays, recently.

73 Mike G4GUG.
Stroud Gloucestershire