Adding a choke to Randall Diavlo RD45H

[Jono434]

If there's any RD45H or RD100H owners that can help, I have a small choke that I'd like to add to the RD45H to bring it closer to the RD100H (which has one as stock). I've put them into other amps before, but locating the filter resistor to replace has been easier in those cases, easier to get the information. I saw this topic earlier and thought that if this member can have some questions answered and good info being discussed.. fingers crossed I can have the same luck. viewtopic.php?t=144537

I have an idea of the resistor it could be, but am not 100% sure and these are the kind of things you want to be 100% sure about.

So if anyone has any experience with this or tips, it'd be much appreciated. Even for RD100 users, if any RD100 users see this, if you know of any gutshots or are able to take one yourself, that'd help a lot. So far, I can't find any gutshots of RD100 online.

It's an old topic now but in terms of the tube layout topic above, I can confirm that it's..

          x         x         x
        OD1&2     OD3&4     Clean
         T1         T3       T2

 
          x         x         x
 
         PI       6L6       6L6
         T4        T6        T5

 

[Jono434]

I'm thinking it's the 5W270ohm resistor beside the big blue capacitors but just trying to be 100% sure. I'm worried it could be one of the two 5W270ohm at the top, because I don't understand what they are for.

I do know that the 5W1K resistors in the middle of the PCB are the screen resistors running off of pin4 of the tubes. Maybe that's why some say you can run EL34's with this amp because they have higher screen resistors than 6L6 amps usually do? Apparently 470ohm is the usual setting for 6L6 and 1K for EL34 and this is because EL34's demand more current. 6L6's demand less so in a EL34 circuit 6L6 can be safe to run but can sound a bit cold and dead. In a 6L6 circuit, EL34's can demand too much current (and stress the transformer?) but this doesn't seem like it would be a problem with this amp.

But I've read that some on here that tried EL34 couldn't bias them high enough in the correct range so I guess the bias resistors would need altering to be able to increase the mv into EL34 range. I'm not interested in running EL34's at this time, just sharing what I've learned based on what I've read on here.. in terms of other people's discussions and questions about this amp.

Here is a gutshot pic (a similar pic for RD100 would help me a lot because I could see which of the resistors is missing from the PCB, with the two wires of the choke instead).

Haven't seen anything like this online for any Diavlo series, so maybe posting this pic helps someone else now or in the future.