New Randall Diavlo RD45 in the house! Need some tube info!

[napalmdeath]

yes, you can use el34's, e34l's, kt77's, kt88's, 6v6's, kt66's and whatever regular guitar amp power tubes that fit in those sockets
the fortin modified rd50h didn't require any bias adjustments and came stock with jj e34l's
not sure if this one needs biasing

It does need biasing, I found the bias adjustment screws after pulling it apart last night. I didn't, however, find any test points. So, I need to get a dual bias probe. I suppose I could do one at a time, but that would be a major pain in the ass.

I think the rd50h didn't have a trimpot
the manual stated it didn't need any adjustment
they probably used a medium setting so it would work with any type

Just got word from Randall.. 6L6 ONLY!

 

[kenjammin]

Did they give reason as to why only 6l6? Such as transformer possibly not being able to handle the difference. Or would it be possible to make the necessary changes for the rd45 to handle el34s. Also I've noted my 6l6s appear to be marked with a 34, i wonder that this is the bias point the pair are matched for, that being noted i have el34s from another amp that are matched at 38. I believe I may have read that 6l6 are reccomended to bias in a different average range and wonder if that difference is a piece of the answer? Ultimately tho i feel like I would pay any reasonable cost to convert.

 

[GJgo]

My RD20 really liked a Tung Sol in V1 and a LPS in the PI. It was a little less gain than the all Chinese set, but also less fizzy & more tone.