Recommend new EL84 tubes

You might try Upscale Audio as they rep Manley gear and they also sell tubes.

Think the early Stingray amps came with EI (Yugoslavia) EL84's.

They have not been produced for years, but Upscale has them in stock.

I used the EI's in a Pilot 232 power amp and a single ended Magnavox amp with good results (sound was similar to Philips/Holland EL84's).

I also used old Russian 7189 types (later marketed by Sovtek as the EL84M).

They were not as 3D, but I still liked them in the Pilot.

However, the Pilot uses gobs of negative feedback (unlike the Stingray).

Maybe old production Amerex/Holland if they want to splurge on the input tubes.

Not familiar with the driver tubes.

DeKay

There's a blurb (somewhere) about the Gold Lion N709/EL84 not lasting long in certain amp designs.

Been to so many tube sites I don't recall which one, but think it was a dealer.

DeKay

LH:

Found it here, and it has to do with the bias design of the amp (so something to check out).

PS:

I played electric guitar from the early 60's to 1986 and, IMO, guitar amp reviews of tubes have little to do with how the same tubes will perform in HiFi amps.

DeKay