Bugera 6260 Pre-Infinium Burned resistor

[solaris3000]

Any help greatly appreciated
I ran across a burned resistor on this 6260 and trying to replace, Not looking for entire schematic just a partial to get resistor identified and replaced.
Also any stateside sources for purchasing these resistors.

Many thanks
Brian

[Jazz P Bass]

Quote:"Not looking for entire schematic just a partial to get resistor identified and replaced."

What circuit are you dealing with?

Power Amp?

Preamp?

What is the resistor connected to?

A Pic sure would help.

Oh, yeah, welcome to the Forum.

Edit: here is the 6262 schematic: 6262 RevF.zip

[solaris3000]

Hello Jazz, Thanks for response and the 6262 schematic, will take a look and compare the two.

As for the circuit.

located on Pre Amp Board
R57

3k9 stamped on board

Resistor is labeled. 5W3K97 possibly 5 watt 3.9k value
this is a ceramic axial type, with both leads out one end. "I've never seen one like this myself"

Date code.
1 4 12


thanks

regards
Brian

[tedmich]

sure its not R63? That one would be expected to be something beefy like 5w 3.9k. Maybe a bad tube burned it, definitely test them all.

[solaris3000]

Hello tedmich , yes that's the one which has v3+,v2+,v1+ to the right of it.

I plan to replace the stock power tubes with JJ6L6GC's

Any ideas on where I might find one of those resistors here in US.


Thanks

[tedmich]

TWM5J3K9E Ohmite | Mouser
$0.82

[solaris3000]

I appreciate that, I've placed an order for a few, Going to replace the Stock 6L6's as well, I hope to report back with some good news and add to the 6260 knowledge base here on the forum. :-)

Thanks
Brian

[solaris3000]

Got the resistor from Mouser and replaced the defective one. The good news is the Amp is working but noticed that both the Resistor we replaced and a Cap next to it get very HOT... The cap is C34 rated at 100uf 500v. On a side note pulled the Power tubes with the same results on these two components heating up.

Should I go ahead and replace this C34 capacitor. do you have a part number for this?

Thx

[Jazz P Bass]

Uhm, R63 'feeds' the preamp tubes.

Pull the preamp tubes.

You should measure the voltage on either end of R63, before & after the preamp tubes are removed.

If C34 is bad try measuring the Vac ripple across it.
A high reading will indicate that it's bad.

Is C34 an 'axial' capacitor?
https://www.google.com/?gws_rd=ssl#q...xial+capacitor

[solaris3000]

The Capacitor tested good, Not sure if it's normal for these 2 components to get hot with the tubes pulled.
I suppose I could run the amp at half throttle by pulling the outer tubes.
At any rate, going to keep checking components.

[g1]

It's the preamp tubes you need to be pulling, like Jazz mentioned above. The power tubes have nothing to do with these components.

[solaris3000]

Pulled the Preamps also, With all the tubes pulled that resistor heats up. I had the Amp on for less than 2 mins for this to occur.

[Jazz P Bass]

So how much ripple (Volts AC) is on the capacitor?

If there is a lot, then it's bad.