#183 Preamp only in a 1u rack case? Ideas?

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martin manning
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Re: #183 Preamp only in a 1u rack case? Ideas?

Post by martin manning »

rogb wrote: ↑Sat May 06, 2017 10:45 amI ended up with 8.6K and 120K on the FET sub to get the volts to 195-197 range.
I get 244vAC on my mains here :!:
Probably a combination of the high mains voltage and the fact that small transformers generally have poor regulation.
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rogb
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Re: #183 Preamp only in a 1u rack case? Ideas?

Post by rogb »

martin manning wrote: ↑Sat May 06, 2017 12:21 pm
rogb wrote: ↑Sat May 06, 2017 10:45 amI ended up with 8.6K and 120K on the FET sub to get the volts to 195-197 range.
I get 244vAC on my mains here :!:
Probably a combination of the high mains voltage and the fact that small transformers generally have poor regulation.
Interesting!
I got 315v on what we would call B+5. Do you think you could run a D-lator with a pair of these Hammond flatpacks?
They are pretty cheap, even in the UK. Might encourage more people to build one?
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martin manning
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Re: #183 Preamp only in a 1u rack case? Ideas?

Post by martin manning »

rogb wrote: ↑Sat May 06, 2017 3:18 pmI got 315v on what we would call B+5. Do you think you could run a D-lator with a pair of these Hammond flatpacks?
They are pretty cheap, even in the UK. Might encourage more people to build one?
That would be a little lower than the D'lator spec (360V on the higher voltage supply node), but I'm sure it would work fine. 229E230 and 229E12.
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