Small signal pentode reverb driver question

[Curbdog]

I have an old Sano/Excelsior amp with a 7199 reverb driver. It originally had the pentode section wired as a triode, with a 10K anode resistor and a 200 ohm cathode resistor, unbypassed. It sounded OK. I rewired it as a pentode, added a dedicated power filter section, and a 56K dropping resistor and .0047 uf bypass capacitor on G2, and the reverb tone is now much, much improved to my ears - having had the experience of a tube amp sounding amazing just before blowing up/catching on fire, and not having any previous experience with a Small signal pentode reverb driver, should I have any concerns or take any measurements to confirm that I can play the amp this way indefinitely? It sounds amazing, but reverb pans, transformers and 7199 tubes are expensive to replace.... Thank you for your opinions !

[Luthierwnc]

Take a look at the Marshall 18-watt reverb schematic on the web. That uses an ECL82 along the lines you described but with a much stiffer bypass cap. You'll have to do the calculations on the difference in the gain structure but it should work fine.

The Gibson GA-19RVT uses a 7199 reverb tube but the driver is the triode and the recovery part is the pentode. Not sure that helps much. sh

[Curbdog]

Thanks for your response - found the 18 watt reverb schematic - interesting ! I should have said that mine is capacitor-coupled to the input of the reverb tank Ampeg-style, and not transformer coupled. Not sure if this makes a difference, circuit-wise.