FS Hafler dh200 parts

[woody]

I have a working dh200 that I am thinking about stripping. I will
sell the 2 circuite boards, filter caps and transformers for $30 +
shipping from 30290. Or I will let the whole amp go for $90 +
shipping. This add is only good through 7/1/08 .

[Dick West]

Which version of circuit boards do you have? Are they built on phenolic board or fiberglass/epoxy with through plated holes. Are the little caps mylar film or ceramic?

Can you post a picture? Or, what is the serial number of your amp?

Do your circuit cards look like this one?

Would you consider selling just the circuit boards, if they are working OK?

Thanks

[woody]

Cheaper boards like in the photo you posted. No I need to
get rid of the transformer ,caps and boards or the whole
amp. Once upon a time the amp was droped and the chassis
is warped a little so for the next 24 hours I will let the amp go
for $70 + shipping from 30290. I am posting this at 11:31 my
time so this offer expires noon 6-28-08 my time.

[Dick West]

Good luck on selling your parts. I love Hafler amps and already have all the parts except circuit cards so not interested.

Haflers represent a very good bang for the buck.

[Dick West]

$$ sent for the boards. More later when I receive them.

Thanks a lot.

[woody]

Dick just bought the boards so this add is CLOSED.

Thanks for the prompt payment Dick

[Stormrider]

Keeping the heatsinks? I need a pair.

[Dick West]

Woody,

Thanks for the prompt service and good packing.

I finally got the two circuit cards installed and added a little DC nulling circuit to each. Now, they are running a pair of mono blocks and the sound is GRreeat!

You are a good man

[Freecrowder]

Was interested in your nulling circuit is it just like the schematic of the DH220?
RG

[Dick West]

No, it is much simpler. It was posted in The Audio Amateur by, as I recall, Walt Jung. Here is a text description:

==========
100K pot between the card's power supply rails and take its wiper, via a 2 meg resistor, to R3.

This is what Acoustat used in the TNT200 for DC Offset. A 100K Ohm, 1/4 watt variable resistor with a 2 Meg
Ohm, 1/4 watt metal film resistor should be fine, 1/2 watt would be even better, at about 4x the current capacity
you need. Place a film bypass cap across the trimmer resistor at the ±60Vdc sides to reduce AC noise from the
power supplies.
=========

Here is a picture of it actually in use. Note the little square cermet variable resistor. I drilled several very small holes in the circuit to facilitate securing the variable resistor and wiring, then with just a touch of solder all was connected and held in place.