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I believe those horns are made by Jensen. Look for the 220xxx number on them.

Hello multichamp. This is a really nice looking amp and great thread. The link to your schematic is no longer working. Could you re-post it or send it to me? I would greatly appreciate it.

I’ve gone back and confirmed my earlier resistance readings. 5V and 6.3 taps are fine. On the HV leads I get a constant R66.5 Between CT and good HV lead. Measuring out to out or CT to bad lead gives inconsistent readings from R1.3K to R8.6K. This tells me the issue would be with one HV lead...

so my story goes like this: I bought the 1st W4 at an estate sale for $50. I start a search on eBay for a mate. After several weeks, one shows up and I grab it ($170 + shipping). In my haste, I didn’t realize that the power trans was not original. Previous owner installed a larger unit and...

What is the measured voltage coming out of your variac? I have one of these and the voltages are close at best.

I have a pair of Heathkit W4-AM monoblocks and one has a defective power transformer (in the photo, the amp on the right is fitted up with the incorrect transformer). I found a Hammond (Model 274BX) that looks like it will work as a substitute and I would like some confirmation on that. Do you...

There’s a nice looking Philharmonic in Schaumburg Il, advertised on FB Marketplace. I think I would grab this one at the asking price but I just can’t buy any more consoles.

As I understand it, Yahoo will stop allowing users to upload files very soon and will delete all the files that have been uploaded over the years on some (if not all) of the groups. I'm a member in the Bozak group and there are a tremendous number of files and countless conversations with...

Hey there, Was this project ever completed?

Revisiting this 6 year old thread because I'm working on a 8802. Can someone please explain C4 to me? Why is it on one channel and not on the other? Also what is the "N150" designation for (Red circles)? Secondly, please explain what the "T" and "R" connections are all about (Green circles)...

I have a pair or the Maggie monos. Well, almost. One’s a AMP150 AA and the other is an AMP150 CB. These are each like 2 amps in one; 6v6 PPP for the lows and a SE 6V6 for the highs!

I just gutted a Tektronix 516 that was loaded with tubes. Lots of 6DJ8s.

Push-pull parallel monoblocks? Very nice! You can ever have too many tubes in an amplifier.

Forget about those amps. I'll take that Bozak!

I have an UL output transformer that measures 95 ohms on one side to CT and 111 on the other. The UL taps are much closer - 44.3 and 45. Is this a problem? If so, is there way to compensate? Thanks, -Joe

No 572Bs but the 811A may be an option. Thanks, Joe Y

The McIntosh MI200 uses a pair of 8005 tubes to produce 200 Watts. The 809, 801, TZ-40, 1625, 813, 830, 807, 211 have all been used by amp builders using near 1KV. The 826, 3C24 and 1646 have been built into amps with much lower voltage.

No problem, Larry. In addition to the ones in the photo, I have several more 866 and 866As. Also 872s. Let me know what you need.

I recently bought 3 boxes of tubes from a fella' through Craigslist. When I got to the guys house and saw the tubes, I nearly turned around and left. The boxes were nasty! Many of the tube boxes had been converted into rodent ranches. There was so much mouse crap in the mix, I didn't bother...

I stopped at an estate sale today and spotted this built-in. The grill was loose so I pulled it away and found this weird looking speaker behind it. I was able to get a couple of photos by reaching into the port opening. Anybody know what it is?

Anyone with 2 Presidents doesn’t need Statesman! Just kidding - but I did let this go (see post #16). Hope your Pres X2 project is coming along. Joe Y

That’s hard to say. I had the purchase price negotiated down to $450. But, I would have had to rent a van as the thing wouldn’t fit in my Venza. Then there’s the rebuild cost.

Well, I’m probably going to regret it for a long time to come, but I let this one go. Hopefully some other AKer picked it up.

I just looked and was not surprised to not fine any '61 Statesman listed, but I did see an AS-100 (without a cage) "serviced" with n asking price of $800 plus shipping. I also know that one sold for $660 a few weeks ago. I have seen the 202T listed in the $200 range. Maybe I up my offer a...