Wurlitzer 200A no audio from speakers but Aux out works

[Tonewheel]

I was hoping that someone could help me with this problem. I took the EP to a technician to look at my PCB. He found several cold solders, which may have accounted for some blown fuses. He installed my Variable Vibe from Retrolinear at the same time. He now tells me that there is audio from the auxiliary out but cannot determine why there is no audio to the speakers.

He has traced the signal path along the wires to the speakers, and this appears intact.

He no longer wants to work on the board. My understanding from an old thread is that any of the transistors 9, 10, 12 or 14 could be the culprit. Any advice would be much appreciated. It may be that I should replace the board with the Retrolinear model, rather than encountering future similar problems.

Thanks.

[Tim Hodges]

If you decide to have it worked on by another tech a good source for those transistors is bustedgear.com

$17 for the set:

http://www.bustedgear.com/part_transistor.html

[Tonewheel]

This is very helpful, Tim. Looks like a very good price.

There is an art to soldering, and I need to learn the art. (I burnt part of a trace recently). Until then, I will try to find another tech interested in tackling the board.

Thanks.

Dave

[pianotuner steveo]

If the guy is a tech, I don't understand why he doesn't just finish the job for you. Did he check the fuses that are soldered into the board?

[Tonewheel]

Good question, Steve. I bought the resettables for him to install, as I really dislike the stock board fuses or the fuse holders that create a jungle.

He is great at tube amps, but I think he just loathes the board, a sentiment not rare among Wurli owners. 

Perhaps it would be less expensive and less troublesome if I just sprung for the Retrolinear amp replacement.

[pianotuner steveo]

Unless he tried to work on the amp with the power on, it could still be a simple solution such as a blown fuse, broken wire, or broken/ burnt trace on the board..I once bought a Wurlitzer dirt cheap because the seller (who was a tech) thought the amp was fried. Mine turned out to be just some cold solder joints.

[Tonewheel]

He's fastidious, and would never work with the amp on, always unplugs power cords, etc. He did fix one burnt trace and some cold solders.

He did replace my board fuses with 2 resettables which I bought through Ken Rich.

I am sure that this is my fault. I do remember having the power on when the PCB was unscrewed from the rail and seeing a funny, almost imperceptible coloured flash beside the board, on the rail, and the main fuse blew.

And the burnt trace was my fault as well.

Wish I was learned enough to tackle electronics. You might be right that it could be a wire downstream from the amp, but I suspect something on the board.

I guess I have 2 options. One would be to take the board down to a TV repair facility with the schematic. The other would be to simplify lie with a Retrolinear replacement. Hate to give in or give up, though...

Congratulations on the purchase of that one!

[cinnanon]

Replace replace replace! You won't look back!

[Tim Hodges]

I'm in the midst of replacing my own Wurlitzer 200a amp as I want something better.

I've gone for one of Borish Electronics replacement Wurlitzer Amps. Soon as I give it a test drive I'll do a write up.

[Tonewheel]

Replace replace replace! Enough already! So I should do this....

I would like to know which replacement amp is the best, cost aside. Retrolinear vs VV in my tortured mind...

[Tonewheel]

I ordered the Retrolinear amp today.

I think I did the right thing for my configuration with the variable vibrato....