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After about 6 years of fooling around I finalized a circuit board with a triac to save the Arrow Hart power switch on the 700B's. I listed it on EBAY tonight. Then I searched for it to verify the listing. The first search result surprised me. Here's the link. 700B Power Switch The $90...

Does anybody remeber Tuge God from the early 80's? He had a manual for upgrading clasic tube gear such as Dynaco, Eico etc. I had the manual, can't find it now. I

What is name of the hookup wire that appears to be stranded but the strands do not separate when the insulatioon is stripped off. It is commonly used on smal transformer leads.

Many years ago a friend gave me a 2000II preamp. It's been on the shelf since then. Recently I checked it out to make sure it functioned and permanently loaned it to my brother. It turns out that the volume control doesn't go completely off. It's not some faint music. It's readily audible...

An individual contacted me who was cleaning out his garage. Decades ago he worked in pro sound and used a ton of 400's. He has/had about 75 XPL909's and 20 or more RCA410's/66546 and a smattering of some other transistors, all small quantities. After a few emails I realized he had been a...

A local repair shop changed owners some time ago. In the process I received their Phase Linear file. They must have been an authorized repair center form the beginning base on the documents I've seen. I stumbled across a service bulletin recently that dealt with silpads. Thought I would...

So there is a Hall of Fame A wall of shame (Peru) And my room of Flame (AKA The 70's room) My brother needed an upgrade from his 35 watt Lafayette receiver. I permanently loaned him the 2000, and a 400 I just reworked. I used this as an excuse to pull out all of the P/L gear that somehow...

Over the weekend I dusted off a stock 400 that had been sitting on a shelf with the intent of repairing it. I suspected issues with the front end in the right channel. I pulled Q1-Q4 and checked them on a curve tracer. They looked ok. I changed them out anyhow. Normally I don't go for the...

My first dial up account was with Earthlink. I still have the account because it came with free web space. That's where my primitive web site has been and still is. Wattsabundant. Apparently Earthlink still exists primarily for those people who only have access to dial up. Anyhow, last year...

Several years ago I bought a computer fan controller with thermocouples to mount on heatsinks and a variable output to drive 12 VDC fan motors. As heatsink temperature rises, the fan picks up speed. The controller fits in a 5.25" floppy drive bay. I bought a stand alone case and mounted the...

It came to my attention that my primitive web site had gone offline. The host, Earthlink, acknowledged "they had some trouble". They got it fixed, but search results for watts abundant no longer finds the page. Until that gets fixed if anyone needs info on my relay boards here is the link...

I'm thinking it's time to start on my 3300II preamp. I haven't kept up with the audio grade electrolytics. What seems to work at a reasonable cost? Looks like I'll need 2.2uf, 4.7uf, and 22 uf. What are the good film types ? I've got a few hundred polystyrenes. Are they still thee choice...

I recently took a look at a couple Peavey CS 800's for a friend. I'm guessing he bought them for less than a $100 in need of repair. The electrolyic caps had a date code of 1978 indicating they're 40 years old. They've had a hard life and were pretty beat up. They're very heavy with a large...

I have a living room with almost all P/L electronics. "The worlds first WOPL 400II" that Lee did a few years ago is in there along with a 3300 preamp and 5100 tuner. Until last weekend I was running ESS 1A's. I got a little carried away this weekend and took out the Heil diaphragms. 've got...

I'm doing one of my own 700B's. The pem nuts on the back plane obviously requires a lot of heat. I found a solution that works pretty good. I bought one of the hot air guns on Amazon (and paid the $2.49 for a 4 year warranty). It did a very good job with some patience. Temperature was 410C...

I'm looking for a 2 way electronic crossover with a summed subwoofer output. Any suggestions? Would like to find a BGW model 20

I'm killing the upcoming weekend in Houston/Sugarland. Anybody nearby that's up for a pint?

Once the rebuild is complete then the testing begins. Those who are fortunate enough to have the test gear check S/N, THD, frequency response etc. Something I don't hear much about is current sharing in the output stage. The test is pretty simple. You drive the amp into a load and check the...

In 1984 I filled out a form and sent it to P/L to become a service center/warranty center. My goal was just to get the service manuals and be able to buy parts. I didn't want to do warranty work as that's a losing proposition. A few weeks later I got the signed form back in the mail. There...

Over at AudioKarma there is a post in DIY about the Panavise 324 that Radio Shack is closing out. I've wanted one of these for ages but couldn't justify the cost. Now I have three. The closeout price is about 1/3 of what they were selling them for...