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I've rebuilt two ST70's, one of which I use in my office system and love it. That being said, about 15 years ago I rebuilt a pair of WM-5's as a Christmas gift to a close friend. I was astounded how wonderful the WM-5's sounded when I completed and then tested them in my upstairs system...

Not too sure there are any solid state tuners from the 1950's. According to the 2003 Orion Blue Book, the 312 line of tuners were introduced in 1960 (312-B and 312-C) while the 312-D was intro'd in 1968.

I'll watch those videos this weekend. Thanks for the info! In the meantime, I've pulled my Pioneer Elite F-91 tuner out of "storage" to replace the F-28. The F-91 sounds nice and is very sensitive but I still prefer the sound of the (now dormant) F-28 by a very small margin.

And as often happens, no further comments by the OP who is a new AK poster. ?

First, I checked my old Lafayette catalogs and there never was an LA-2020A. The "LA" prefix would be for an integrated amplifier, a receiver would start with "LR". There was an LR-2020A stereo receiver which was rated at 20wpc rms ($249.99 retail) so I'll assume that's the unit you own...

Well, my biggest fear took place a couple nights ago. I fired up the upstairs system and discovered my beloved Pioneer (Series 20) F-28 FM tuner's stereo, tuned and locked lights attached to the dial pointer assembly weren't firing up. Hence, total silence. The F-28 uses a unique photo sensor...

Yup, those bumblebee caps have got to go. Every tube amp or preamp I've rebuilt had either cracked or leaky bumblebees. They just don't age well!

You are correct! I just checked their website.

Oops! No tube shield is used for any of the MC-30's small signal tubes.

Terrible news indeed. Terry was a wonderful human being and will be missed by so many folks whose lives he's touched. God speed, Terry!

This is from another post but I confirmed this with my Hickok test data manual for the Models 533A, 600A and 605A. KT-88 setting: Filament 6.3 Selectors JR-5347-2 Bias 12 English 92 Gm (expected of new) 7000

They look like old wax/paper in oil caps to me. Personally, I'd toss them and replace with polypropylene caps.

No. The SX-2500 "remote" is wired to the unit. IE-the "remote" has a cable that plugs into the SX-2500. It is not RF or ultrasonic in operation. The SX-737 does not have the necessary socket for that "remote".

Jazz last night on WBBT, public radio 107.3mhz in the suburbs of Richmond. Tuner is my grail Pioneer/Series 20 F-28.

Oops! I'd like to sub the M-22 Class A amp (Series 20) for the SX-1500TD since it and the SX-2500 look very similar. And, maybe the CT-A9 cassette deck for the SX-1010

SX-2500 SX-1500TD SX-1010 F-28 Tuner (Series 20) PL-C590 Turntable (Series 20)

Someone needs to drive by his house and knock on the door. Too many excuses over too much time. Yeah, I know, cold and callous but this man has lied about his promise to update folks/customers the past two or three years. He may be a wonderful person but there is no evidence of that, now...

When I built my Stereo Cost Cutters/Dynaco ST-70 kit back in 1988, I didn't know about matched tubes and therefore accidentally mixed up the quartet. The left front tube (EL34) began to red plate. There was an immediate, increasingly loud hum in the left speaker just as I cut the power...

Is it possible that those IP rights had expired? I was told by a tube industry honcho (who will remain anonymous) that the Tungsol/Mullard/Genalex names were acquired at no cost/fee. I, too, had assumed they were still owned by someone previously.

B&H confirms they are made in the Slovak Republic which = JJ. Now, JJ makes a very fine 12AX7/ECC83S tube at a reasonable price but $62 for tightly matched JJ ECC83S is way too expensive IMHO.

Well, Mike Matthews (Electro-Harmonix, Sovtek, etc.) was able to grab the names, "Tungsol", "Mullard" and "Genalex" for free since (I assume) the copywrites/patents for those had expired. Perhaps JJ was able to do the same for their "Telefunken" branded tubes.

How about Spica's John Bau? The TC-50 was an immediate hit with its convincing soundstage and imaging. He also produced the Angelus. I still run a pair of TC-50's bolted to the Sound Anchor stands specifically made for the Spica's. Too bad he left the industry so soon to pursue other...

Oops! I guess I pulled that thread from the "Similar Threads". Totally forgot to check the date(s). Thanks for pointing that out!

Simply not true IMO. When Marantz moved production from the USA to Japan in the 70's, they bought Standard Radio and its factory(s) who then produced/manufactured their gear. When Philips bought Marantz from Superscope (I believe), they may have contributed raw CD transports, as an example...

No, the wood piece you see in the picture is actually the top of the desk the preamp is sitting on. Both the top and bottom panel were removed in this picture. The post I'm referring to is threaded brass. When you remove the screw that attaches it to the bottom panel, the idea is for it to...