fbird1969

Responses from fbird1969

Hafler DH300 Monoblock forever?
OK, thx again, will go that route and let you know how I make out! 
Hafler DH300 Monoblock forever?
I tried the exercise and grounded one (-) of one input channel. It didn't make any audible diff. Here's what I found tonight. The hum will emit from the speakers once either one is conncted to the amp WITHOUT any pre-amp input plugged in. Then whe... 
Hafler DH300 Monoblock forever?
So far I tried the new DH300 and tried reversing the power plu polarity and that helped considerably, but there's still hum as soon as I plug the input cables from the pre-amp into the Hafler. I have not yet tried to ground the Hafler chassis with... 
Hafler DH300 Monoblock forever?
thx, I screwed up and am pretty sure I grabbed some 2.2K ohm resistors at Rat Shack instead of true 2.2ohm, will need to correct that, and report back to you. 
Hafler DH200 sounds scratchy /static
The pre-amp has been sitting also, it's a Classe' CP-50 purchased in 1999' with regular and balanced outputs. 
Hafler DH300 Monoblock forever?
Wow, almost sorry I asked, now I can't plead ingnorance. Will have to see if I can locate someone with one to lend me. I have a plain vanilla DVM I use so I don't think that it will fill the requirement for "True RMS" readings.On another note, I w... 
Hafler DH300 Monoblock forever?
Im going to show some of technical ignorance here, but are you referring to the big caps, 10,000 uF that are connected via the bridge rectifier? I think I can pick up a set from QA-Con , I think that's the supplier on eBay for about 50 bucks. They... 
Hafler DH300 Monoblock forever?
Yes, both inputs are going right up to pins 1&2 on the PC6 boards. If I convert back to regular phono jacks on the inputs I imagine there must have been some good reason for the 2.2 ohm resistor on the right input jack of my similar DH-200, be... 
Hafler DH300 Monoblock forever?
There is no PC7 board, just the regulat PC6 boards like my DH-200 has. It looks like it's wired the same also, the only difference I see is the input jacks are like those you'd find to plug full size headset type plug into, not phono jacks, so the... 
Hafler DH300 Monoblock forever?
Thank you. So, it sounds like if it has the PC7 board in there, it replaced what was there originally for that channel, and I'll need to find another board to revert it back to the original condition it was in as a DH-200, correct?