Looking for a Vox 710 schematic with ECC88 detail

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ombudsman
Posts: 27
Joined: Fri Apr 27, 2018 8:20 pm

Looking for a Vox 710 schematic with ECC88 detail

Post by ombudsman » Sun May 13, 2018 5:55 am

Does anyone have a schematic for a 710 that clearly shows the circuitry around the ECC88 tube ? I have downloaded the schematic that seems to be floating around, but it doesn't specify the tube types in the preamp and I have read that there are different versions of the amp. I saw a reference to another schematic but I have not been able to find it.

I suspect my amp has been modified to change this tube to an ECC83, so what I would like to do is track down the details, or the best pictures I can find of this part of another 710 that has the ECC88, and show those to my tech and ask him to first determine if that part of my amp is non original. If so, I would like to put it back to the original circuit, as I have long felt that the amp is a bit darker than it should be, and the ECC88 tends to be a bright tube.

This is the schem I have
http://el34world.com/charts/Schematics/ ... ox_710.pdf

Any help appreciated... cheers
ombudsman
Posts: 27
Joined: Fri Apr 27, 2018 8:20 pm

Re: Looking for a Vox 710 schematic with ECC88 detail

Post by ombudsman » Mon May 14, 2018 11:07 pm

The plot has thickened - it seems that these amps may never have actually been built with the ECC88. If that version does exist, it is a minority case with most being 1 ECC807 2 ECC83 (and some later ones being 3 ECC83).
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