Katie Bush wrote:Hi Andrew,
It's a pity you live so far away.. A year or two ago, our own "Till Eulenspiegel" refinished the top of a console cabinet for me (French polished) and what difference it makes.. Till's method left a very smooth finish that merely required me to wait for a while (quite a long while) for the finish to harden enough for me to polish up to a deep shine.
Don't do this at home, folks....
I once heard of a neat trick that calls for methylated spirit, a match, and a LOT of nerve.. The result, I'm told, can be very good to excellent.
I think Michael W has pointed out in the past that to all intents and purposes, they are actually the same valve.PYE625 wrote:As a sync separator and phase discriminator (lovely big words ) an ECH83 is used.
This a valve which was designed to operate with a low HT ( 50v maximum according to data ) such as in a car radio.
In this set, its anode voltage is 25v and 12v on the screen, but rather naughtily has 75v on the anode of the triode section.
I tried a ECH81 and it worked ok just the same, so I can't really see why Philips used the ECH83.
Perhaps someone with better knowledge than me will explain ?
Cathovisor wrote:I think Michael W has pointed out in the past that to all intents and purposes, they are actually the same valve.
PYE625 wrote:I'm inclined to agree, as there seems to be no noticeable difference in operation or electrical conditions, with either valve in this set. I haven't bothered to put the ECH83 in a radio as I'm pretty sure it will merely confirm the above anyway.
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