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I can send Tony to break his knees if he reneges...

245 Miles from me. 7 hours round trip. I could do a road trip if you are buying breakfast and lunch.

We need more details for the obituary... Tweeter type - Tweeter Manufacturer - Tweeter Impedance - Tweeter Frequency Bandwidth - Crossover Frequency - Amplifier Responsible for the Loss - Band Involved - Song Involved - Were You Sitting or Standing - We are a curious group.

From the AI-sphere: The RCA 410 transistor, developed in the early 1950s, was part of RCA's significant contributions to transistor technology. The DoD assigned NSN 5961-01-0006-8005 to this transistor in 1975. Phase Linear probably bought a majority of these transistors during production of...

Epoxy under the capacitors for better Bass Response...

Chemical=Electrolytic in Belgium.

I would be curious about the Gain (hFe) readings on these newer RCA transistors. Real RCA 410 (and the exact same RCA transistor with a different P/N 66546) measure anywhere from 14 to 44 on my Sencore TF-151A. Your readings will be different but the range should be similar. Newer transistors...

You are doing all the right things.

If you mean the SAE 5000A, yes I have one for sale because I no longer have a turntable nor a tape machine of any type. It has been upgraded with new Electrolytic Capacitors and performed well when I had my turntable, it includes the Manual in soft copy. I will send you a PM. PM sent. Now I...

That is very kind, but I am hesitant to start a "GoFundMe" for this guy. This Forum is so great that I feel others might be compelled to help out and I am not that good at running a cash ledger. Hell, I might get more than he needs. Thanks for the offer, you guys are amazing!

Yes, Joe is sourcing them. They will likely be similar to or the same as the WOA Model ONE VU Meters because the new meters require a new Meter Bracket, Meter PCBs, and Faceplate to fit the PL400.

The disappearing Toggle Switch.

And in the WOA Model ONE clipping occurs around an input signal of 2V?

Thank you for the offer (a good one). But I have bitten off a bigger piece and told Joe that I will be his Guinea Pig for the initial test of the WOA PL400 Meter/Faceplate Upgrade. He is working on the fabrication part right now and I may see the parts arrive before the end of the year. This is...

You will also need the two PNP columns of ONSEMI MJ21195G Output Transistors for the Fully Complementary operation to be... complementary. Personally, I would change out the existing NPN Output Transistors as well, use ONSEMI MJ21196G. If your amplifier still has the Silicone grease/mica...

Serious input wiring cables!

Ontario Motor Speedway was a great outdoor venue and Tycobrahe Sound did an outstanding job with the sound system including use of the Eventide Clockwork 859-second digital time delay between the front and rear speaker arrays. "54,000 watts of audio power... 105 dB SPL at one mile... 200,000...

The way that the Output Transistors in the Left and Right channels are on opposite sides of the amplifier gives us that stereo separation even in mono recordings... 1956 was a good year!

I saw Black Sabbath play at the California Jam on April 6, 1974. Tony's guitar sounded like 1000 chainsaws on overdrive but the music was so clear, I can still remember the band playing together like a well-oiled machine under Ozzy's maniacal leadership. Tony Iommi was the primary composer and...

The Bias reading will probably not change much, now that you have two rows of Output Transistors installed. The real Bias check is after all your Output Transistors have been installed and the amplifier has been producing some serious music for thirty minutes or so - it will be nice and warm. Or...