Tube Amps an Interesting Project.
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HBombToo
Posts: 5,256
I'm thinking about building this.
http://www.tangible-technology.com/tubes/altec.html
an excerpt:---
With the original transformers, the first 1566A was usable and full of character. The second 1566A had problems. The power supply sagged when the output transformer was connected. I changed diodes RS-1 and RS-2 and then discovered that C5 was leaky. Rather than find transformers with octal plugs, I removed the sockets, created hardware for the new transformers and mounted them directly to the chassis. What I had "laying around," was a Jensen 115k for the input (as always, very nice) and a Sescom MI-33 which had the correct impedances, but could not handle the level at low frequencies. Just before this article went to press, I scored two of the Bauer output transformers, a significant improvement indeed! ---
I would increase C5 by 1 order of magnitude.
HBomb
http://www.tangible-technology.com/tubes/altec.html
an excerpt:---
With the original transformers, the first 1566A was usable and full of character. The second 1566A had problems. The power supply sagged when the output transformer was connected. I changed diodes RS-1 and RS-2 and then discovered that C5 was leaky. Rather than find transformers with octal plugs, I removed the sockets, created hardware for the new transformers and mounted them directly to the chassis. What I had "laying around," was a Jensen 115k for the input (as always, very nice) and a Sescom MI-33 which had the correct impedances, but could not handle the level at low frequencies. Just before this article went to press, I scored two of the Bauer output transformers, a significant improvement indeed! ---
I would increase C5 by 1 order of magnitude.
HBomb
***WAREMTAE***