Recent content by wattsabundant

I also buy Pomona MDP's in bulk. For home use and permanent install they're great. Decades ago I worked at a pro audio shop. One day a guy brought his rack back after I had repaired his 400. He was upset because one channel was dead. I looked at the back of the rack and showed him that the...

A wise person buys 10's in bulk, (1/4" and 3/8 drive including deep and shallow sockets) and stashes them everywhere.

I use water soluble flux and go to the sink.

Although the compliments are much appreciated, it is the hundreds of people here who check their egos at the door and contribute their accumulated wisdom that make this site a must read.

If any of the 700/400 xfmr's failed it would be an exception. They are the basic E/I steel lamination type and there is little reason to expect failures even at high power applications.

It's not likely the parts vendor info was ever made public as the repair people could use other sources and avoid the P/L markup .

What does the inverter waveform look like? Modified square wave? PWM?

I registered as a P/L repair facility around March of 1983. I requested manuals and received everything available at that time including a 37 page "SERVICE DEPARTMENT PARTS LISTING" dated 3/1/83. Ed, I'll scan the list and send it to you. Please message me with an email address. From 1978...

The 4000 preamp is a nightmare. It will have at least 100 cracked solder joints on the mother board. The RCA jacks are brittle and break easy. Don't bother plugging it in until you reflow the pins. Bring up the amplifier with the light bulb test set. Anything that has set, unused, for a...

See attachement.

1226

I doubt you'll notice any difference but it shouldn't hurt anything.

... Thanks for the kind comments. It's rare that I get any feedback and good or bad, much appreciated.

The date code is 40th week of 2001. (0140) they appear to be legit RCA's. Ideally all drivers would be RCA410's. If you're buying transistors, pick up Berquist silpad insulators. No grease required.

Ed, It's good to see you still sharing your infinite P/L wisdom.