Danelectro DM-25

[Structo]

What I recall about the reverb was that it is very sproingy.

Not a natural sounding reverb by any stretch but if you are into surf music, it should serve you very well.

[Andy Le Blanc]

I've wondered about that verb drive circuit, looks push pull.
Did you say "piezo"?
Don't happen to a snap of the inside of the verb tank?

[Structo]

On the amp I worked on the bolts holding the tank were rusted and I didn't want to take the chance to break anything so I didn't mess with it.

But it's an odd setup.
That square bar looking thing is the tank.
It hangs from a couple spring steel type leafs I guess to isolate it better.
Not sure what kind of sensors it uses on the spring.
For me it wasn't very useful but then again, I don't play surf.

[ChrisM]

I just got a DS100 on the bench.
Same thing more or less but 50W stereo output section using 6L6GCs, two chassis. No schem exist.

Can anyone tell me the output load though? 8R? What was your Tom, probably going to be similar.

[ChrisM]

Tom how did you deal with removing the two conductor cord and the ground switch?

[Structo]

Chris IIRC,
I used the ground switch simply as a connection point but disabled the switch.
So I left it in place but wired around it.

[funkmeblue]

the 6x4 is a 6 volt tube. There should not be any reason for a 5 volt filament in that amp

[ChrisM]

Here is the finished DS100 I worked on.
Very interesting amp circuit wise, very similar to the Silvertone 1458.

Output Z is 2.67R


(sorry for picture quality, phone pics)
[IMG608]http://img.photobucket.com/albums/v610/ ... /Dano1.jpg[/img]

[IMG465]http://img.photobucket.com/albums/v610/ ... /Dano2.jpg[/img]

[jon]

Someone told me you can make new reverb tanks using phonon cartridges. Maybe it is a myth.

[frank1330]

DM 25 original owner - looking to sell
This was my Amp back in '65 when I played farfisa through it. Later got a fender bassman, so danelectro didn't get much use.

[Prairie Dawg]

someone already saw what I saw.

[Timbo63]

I have been restoring what seems to be a great sounding little amp, apart from the the tremolo which had not been working. I started with replacing the faulty 12ax7 and then on to the coupling caps and drifted and broken resistors related to the tremolo circuit. The tremolo now works except for a tick sound that occurs at every pulse of the tremolo, I think this is a parasitic oscillation and I may have to redress the signal wire going to the 2 control pots which are not shielded. If there is any body with experience on resolving this sort of problem, I will eternally be great full.

[DocDino2]

Just got my dads old Dan DM25. Gave her a good cleaning. Replaced the cord with 3 prong and ended not using the ground switch and death cap. Checked the caps and all looked good. Power tubes fired up ok, but probably need replacing due to age. She sounds real good but the tremelo is almost non-existant. Reverb is great. You think the caps on the preamp side giving me the problem on the tremelo? I hate not getting it totally restored.

[dgrainger]

Have you replaced the tremolo tube? It may be worn out if you haven't.

[FUCHSAUDIO]

Change the filters with new, replace (don't bother testing) any of the audio caps (usually Astrons) with new, especially the tremolo oscillator caps. Of-course try the tremolo tube.