Fender Hot Rod Deluxe Reverb issue

[spuddo]

Helmholtz

Will check with 1khz input

g1

The bad hair day just got worse-------yes it was a typo.

The Dude

Have continuity checked the cables all OK , also made sure RCA connectors are tight fitting

Enzo

It was a typo------apologies

Thank you all for your inputs (or was that outputs---DOH)

[Helmholtz]

The note 6 references U2B. I thought the unloaded gain of U2A would be 1 + (4700/47), which comes to 101 ?

You're right, of course.

I had noticed that the rev input transducer is in the NFB path (load current feedback for constant current drive), so gain will shoot up with load disconnected.
Then I saw the note, misread and didn't check back, as the number seemed to be in the ballpark.

My point is that schematic signal levels require the load to be connected.

BTW, with this reverb drive wiring, the input transducer must not be grounded.