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Yes. In fact bringing power to the backplanes before transistors are there is explained in the procedures. What your looking at is the part of the install where it says to test fit the transistors to the backplanes to ensure no bent leads. Then you take them out and stick them back in the...

Monday evening; re-routed the thermal cutoff and power wiring. Added a new 30Amp Bridge Rectifier and snubber caps. Then replaced the speaker binding posts and RCA jacks. I put in the nylon shoulder washers and basically prepped for the boards going in. I added Joes boards and Don's DC Protect...

I think most of his amps are like this. They always sat 12-feet high on the top shelf for the last 40 years. No kids to get their grimey hands on them. LOL! -It also helps I alcoholed the snot out of the chassis before I started adding ANYTHING. No dang tiny miniscule solder blob's gonna get me...

Got the assembly of the Backplanes Done the couple days after Christmas. In THIS particular instance; I had Joe assist me on the PEM Nuts. Since it's for my father and not a personal project; I want to make sure it's as successful as possible. And I can't thank him enough for the assist...

My father in-law came over for Christmas and I have been warned in the past by my wife that his attitude varies from one year to the next. It could be "F-The Holidays" or "This is Great to be with Family". This year it was the first. He said Christmas had lost it's meaning and "F-presents" and...

:wwoutpics1: Yeah I know. I have them, but I'm going to post in drips and drabs. Some people here don't like long paragraphs or explanations. I'll play catch up eventually. Can I ask the Moderators here to move this thread into the WOPL Building Category? That's what this thread has morphed...

Alright, So my Father has Retired as of Dec 23rd. In his 70's now, the man has worked way longer than he should have. But work-aholics run in the family, I get it. Now he is ready to turn his attention BACK to speakers and amps and Vintage gear. I am continuing this thread where it left off...

Thanks Joe! I am already half-way into the project. I have had a hard time getting on here through an actual computer. My Home PC Tower decided to take a Dump on me two weeks ago and the company laptop I use ONLY for running AutoCAD Electrical 2021. I don't surf with it, but right now....I have...

Mark; I literally received them on Saturday. So you were CLOSE! Thanks for sending them!

Depending on how well this project goes; It was a good idea to purchase the transistors. I may end up not doing backplanes on a future build and go Quasi and well....let’s face it. At 23 cents a piece, I really didn’t feel too poor for ordering ten of them. (The next price reduction was at qty...

I can’t even say it’s limited to USPS. I ordered that ON-OFF-ON switch from Mouser for Joes new Rev C PL400 light board on Dec 8th with 2-Day Fed ex shipping (because it cost the same as snailmail), and it got stuck in some Fed-Ex hub on the 10th. That was the last update I got from tracking. My...

Hey Mark, I still haven't received those yet? I suspect the USPS system either lost it or the whole Covid excuse thing is really affecting even something as simple as your envelope. Joe sent off a PL400 Light board to me like three weeks ago and it's still not here. USPS hates Tubes. The...

We had SHIRTS?? ......... o_O

I found a solution to that a long time ago in a bi/tri-amped system. Get ALL 700B’s. They already have built-in gain controls. The highs are overpowering otherwise. Just turn em down and tune em in to match the lows. The needles bounce the same and power output matches that of the 400. Yeah...

Here’s what I really want to know. What kind of MUSIC, or hell....better yet SPEAKERS do you guys listen to than can sustain the kind power driven at Mach Ten long enough to get the power cord warm before your ears don’t explode FIRST?? I can see runnin a Vacuum cleaner which pulls enough amps...

Generous offer. PM sent.

Thanks for providing that info Joe. I hadn’t recalled anyone here ever saying what it was. I think that’s what Don provided me. But it had a slightly more blue hue than what the PL originals had. Of course, you are also comparing 40yr old srtips to new. Since I have so many amps in the same...

It was my brothers two PL700B’s I was replacing light boards on last week that made me remember what I had done 6 years ago to my own amps on the diffuser strips. Had he not brought them over for work, I never would have recalled. One of his amps had an original board that looked like the heat...

Haha. It's all good Perry. Your experience with these things is far greater than my own. I can only speak for the one or two I have had in the past that had the yellowed filters you describe. What kind of filters do you normally use to replace those? Is there a "Go-To" type of material you like...

I was WAITING for you to chime in Perry. I served the pitch to you on purpose. Wanted to give you a chance to gloat. Like I said; calling myself out here. I honestly did not remember replacing ALL the filters; (that was back in 2014), but obviously the ones obtained did indeed differ from what...