Hello Ruben,

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for your question, you have to think about the main purpose of this purchase; did you intend to buy a plugin and what frequency range, or just to repair and resell? If it's to resell (without a plugin), I don't think the effort is worth it.

If you really intended to buy a plugin, then you have several choices, you buy a new 8350B with the plugin included and sell the one you have, or you buy a plugin and repair with or without modification, the 8350B.

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You say that the transformer is unrepairable mainly because of corrosion, because the burnt wires are replaceable.

So, if this is really the case, you will have to modify the 8350B to insert the 8566 transformer, or find a really compatible or original transformer for the 8350B.

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By chance, today, in exchange of a piece of equipment I was not using, I received an 8350B and an 83595A module.? The 8350B has several problems so part of the front panel is not working, and the 83595A needs to be checked and adjusted completely.

So, like you, I will work on restoring an 8350B...however the problems are less severe.

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Whatever you decide, I wish you the best of luck.

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-Yves

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Hello

Thanks for the idea Yves, I thought that at first, but the original transformer is totally burned and has 4 windings in dead short between them. Also the varnish, wax paper layers and corrosion of the iron core makes the rewind task imposible. That was the reason to buy another transformer. The wrong transformer :D

Today I did supplies adjustments, all need tuning and the -40 was the only one that I couldn't adjust due to the lack of 40 millivolts,?I suppose that due to the imperfection of the connections or tiny differences on input voltages. The built-in test still says power supplies are ok (no error 004). Also adjust the 10 volt DAC reference.?

?- Current draw on the 20-0-20 secondary (which feed both 5 volt rails, 5VA and 5VB) is 4.3 at start and then 3.8 A continuous.?
?- Consumption on the rest of the rails are under 0.5 amp, probably due to the lack of plugin.

Now I feel discouraged... don't know if spend money in a plugin or abandon project

If anyone has an idea or advice, I'm open?

To be continued...

Ruben