30-05-2017, 11:09 AM
(This post was last modified: 30-05-2017, 11:11 AM by Geordie McBoyne.)
Hi Jeffrey,
this receiver in it's modified form has two RF amplifier stages plus a possible gain contribution from the frequency changer valve. I'd imagine that it's possible that 100mV could be present at the first sound IF transformer even from a weak transmitted signal.
I will in due course replace the W61 vari-mu with a high slope RF pentode.
The EHT supply unit was made over twenty years ago for a similar TV project which I can't remember. It was later borrowed by another firm which had a requirement for a high voltage module. I've tried Googling "Start Electronics Limited" but nothing has come up.
Geordie McBoyne.
this receiver in it's modified form has two RF amplifier stages plus a possible gain contribution from the frequency changer valve. I'd imagine that it's possible that 100mV could be present at the first sound IF transformer even from a weak transmitted signal.
I will in due course replace the W61 vari-mu with a high slope RF pentode.
The EHT supply unit was made over twenty years ago for a similar TV project which I can't remember. It was later borrowed by another firm which had a requirement for a high voltage module. I've tried Googling "Start Electronics Limited" but nothing has come up.
Geordie McBoyne.
