Curious_George

The gloss black looks great. I like that you can still see some grain of the wood. Very nice. You would be surprised what one may offer for those even if they are not "original".

Do you recall the speakers he was using with the Little Sweetie amp?

It is a shame we do not have more DIY builders here (for amps).

It would be interesting to know that actual tubes the Russians did invent versus cloning western tubes. I'm sure I could Google it, just haven't.

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The Hammond chassis is available too. This is what I used on Rich's amp. Hawk USA has a good price and selection, fast shipping. Hammond Chassis 1444.pdf

I recently procured some 2uF motor run caps that are new production so they are polypropylene / foil in oil. I also have some 7.5uF’s too which will allow me to change the tweeter section in my universal network. Interested if I’ll be able to hear a difference.

BTW, I also have a pair of 872 rectifiers that I am going to use in combination with the 833A's. I know not many people like using mecury vapor rectifiers, but the glow of them would add a visual effect to the amp.

I have a pair of 833A's that are waiting for a future SE projects! Looks like you are on my design team Cappy...

I do have a replacement tweeter for the Advent, another modern ring radiator, but I have not integrated it into the loudspeaker yet or modified the crossover. Forth coming...

Well, we will help you re-live the glory days! Since this is my thread, I'll digress, aside from being a Klipsch Heritage speaker fan, I love the opposite end of the spectrum as well, the Original Advent Loudspeaker. I have a set that I restored and even though they represent the antithesis of what a Klipsch loudspeaker is, I love they way they sound and can appreciate both for what they are. As a HUGE bookshelf speaker, they indeed go down to 30Hz by themselves and sound very natural, but you need some power to drive them. Some people love the tweeter, others hate it. There does not seem to be a middle ground, but I don't think it is that bad. No worse than the original JBL L100 tweeter, which most people think sound OK for what it is.

I know Dean has said his previous experience with a tube amp on Heritage speakers was less than overwhelming, but that is in contrast to my experience. I wonder if the speaker he was using at the time had a flat impedance curve? Granted, not everyone likes a low power tube amp on speakers.

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Dean, have you done any comparitive listening between the aftermarket autoformer and the T2A? Other than the taps offering different levels of attenuation, do you think there is a sound difference?

I understand. It's hard sometimes to get the right context when reading text a lot of times. I apologize anyhow.

Got your message Chief. However, it's not that I like to stir-up trouble. It sounded like Dean was lamenting spending two-days working with someone, that's all.

Is that a midrange slot or a peep-hole?

Ah ha...

M6/29 ga is pretty standard and looks like what is used in a T2A. CRGO steel is the only game for audio applications...

Ok, I understand.

"spent two days working with a vendor to ensure they use the right steel in their laminations" Sounds like a vendor should know what type of steel they need to use. I figured there cannot be too many steel lamination choices; M6, Z11, amorphous (which I doubt you are using). And for an autoformer, M6 should be more than adequate. Is there anything special about this next series you want to share?