DIY HiFi Forum

In an original response below,

63.241.190.32

In Reply to: RE: Fired it up, no smoke, no joy though posted by bcherry on May 01, 2008 at 22:10:12

I asked:
http://www.audioasylum.com/forums/DIYHiFi/messages/8309.html
Converted Dynaco circuit ( DHT 6B4G's, 2x2 tubes, instead of EL34's, and 3 small front end tubes, similar to Dynaco ), how many of these supplies would be needed for all power tubes, for 3 front end tubes?

and you replied:
http://www.audioasylum.com/forums/DIYHiFi/messages/8313.html
For the 4 pcs 6B4G 1 pair of filament supplies. You would need about 8.5v AC in.

Since 2 6b4G tubes appears to put significant load on the device, and voltage drops significantly accordingly, I will get and install two filament tranasformers: Hammond 166M8; 8.5 C.T.; 3A.

The use of the 0.47R was based on my interpretation of indications in the device info/spec sheet available on-line. It reads to me that the resistor can be used to go from 0-5 to 0-7.5. In fact, OCV, I did get a 0.3V increase with the R in, and this suggested that interpretation was consistent. Under load though, is a different story ...

Thank you for your time.

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