Route 66 schematic question

[Tdale]

On the chassis pictures I've seen of the Route66, there seems to be a difference between amps. On some, there is a big (47uF) cap next to the bias circuit at the end of the turret board. On others, there is no big cap there, only the bias caps.

Any idea?

Also, I notice that the caps/resistors used are a bit different. Some have what looks like silver mica, other hav a bigger cap for the tone stack. Also I see some Allen Bradley resistors in certain places on certain amps. Any reason for this you think?

Tommy

[M Fowler]

I would go over to the DR Z forum, link at his amp site, and they have a technical discussion there and you can ask away.

Mark

[jaysg]

Also, I notice that the caps/resistors used are a bit different. Some have what looks like silver mica, other hav a bigger cap for the tone stack. Also I see some Allen Bradley resistors in certain places on certain amps. Any reason for this you think?

Most manufacturers do two things with an existing product line:
a) They make parts subsititutions for obsoleted and/or long lead time parts
b) They maintain market surveillance for quality issues. In the case of a guitar amp, reliability and tone are quality issues.

[rhinson]

the amp only has the one punch for a dual can cap. so he either uses a 50/50 (one section for plates and one for screens) or uses a 33/33 and parallels it for the plates and sticks the "big" cap (probably a 47uf - 100uf) on the end for the screen section. i've heard some people complain of ghosting in these amps so that's probably his fix attempt on some of builds.

rh

[sliberty]

I've seen multiple gutshots of the Z-28 which also differ in this manner. (the Z-28 is largely the same amp as the R-66 anyway with different power tubes and OT). As Robert said, sometimes he has used cap cans only, and in other cases, he used a combination of cap cans and caps on the board.

[RB]

the amp only has the one punch for a dual can cap. so he either uses a 50/50 (one section for plates and one for screens) or uses a 33/33 and parallels it for the plates and sticks the "big" cap (probably a 47uf - 100uf) on the end for the screen section. i've heard some people complain of ghosting in these amps so that's probably his fix attempt on some of builds.

rh

+1 on the above. I have built a few clones of the 66 and the 28. At this time I Feel that I wasted a lot of time and resource. Wish I had put the time in wrecks or dumbles. Both are copies of Leak HI FI amps nothing really original.

RB

[Brad737]

I'm just totally guessing, but I know that the early Route 66 had a problem with ghost notes. And Dr. Z figured out what to do with the circuit to solve that problem. Perhaps you're looking at an early, and a later Route 66?

FWIW, I have a Route 66. I think it's a very sweet amp. Loud sucker though!

[funkmeblue]

what transformers are you guys using?