Peavey Heritage vtx 2x12 question

[ManMartin]

Hi all.
I am fixing a Peavey Heritage vtx 2x12 and in the power section before the tubes I found two transistors that do not match with the schematic.

Schematic says a couple of 2n6465 and I found MJ15022. Does anyone knows the correct one?
Any picture Of the plate to check it?

I saw that it has some previous work on it so I dont know if they was changed.

Thanks from Spain

[Jazz P Bass]

As the 2N6465 is not readily available, the MJ15022 is a valid substitute.

A little overkill on some of the specifications (higher voltage and current capability).
Still, a valid sub in my book.

[TomCarlos]

Martin....

If I am not mistaken, the Peavey Semiconductor Cross Reference list shows the MJ4247 as SJ-6465 (70406465) NPN Tube Driver Replacement.

Specs for the MJ4247: IC(A) = 8, VCBO(V) = 120, VCEO(V) = 120, PD(W) = 90, Package = TO-3, HFE(Min/Max) = 40, IC/VCE(A/V) = 0.1/2.0, VCE(SAT)(V) = 0.5, ic / IB(A/mA) = 1.0/100

The MJ15022 (http://www.newark.com/pdfs/datasheets/SSI/10P1534.pdf) has a Collector Emitter Voltage V(br)ceo: 200V with the DC Collector Current: 16A- most likely an "overkill" for this application (but it should work).

Anyone else?

[J M Fahey]

So the original one was replaced with a much better one

But the mystery question is:

1) are the replacements working?

2) what are you actually trying to solve?
What are the symptoms?

[ManMartin]

Hi again and thanks you all.

The PDF from Peavey is a good Info to try the suggested compatible transistor.

I was worried about kill some tubes using the MJ15022, do you think it is dangerous or only a little bit too much forma this situación?

I am still fixing it but came to live, still dirty pots and no reverb can found.

Cheers

[Jazz P Bass]

As a substitute, the MJ15022 will not hurt the circuit at all.

[ManMartin]

Hi.

It had one 1k5 resistor open for one 6v6 tube, and one MJ15022 short from the too Of them. 1A fuse blown.

I tried 2k and one MJ15024 to test.

It sounds back with the temporary components, I must change them for correct values and go on cleaning pot and look fot the missing reverb tank.

Thanks

(Sorry. I posted into a second thread I m affraid)

[ManMartin]

Great. Thanks.