Rerurn to Romy the Cat's Site


In the Forum: Melquiades Amplifier
In the Thread: DHT driver & input
Post Subject: How high is too high?Posted by floobydust on: 1/31/2009
fiogf49gjkf0d
 Romy the Cat wrote:
 gordan wrote:
plus they IMHO sound better - less prejudiced towards a romantic SET sound we all know (and some try to avoid).
Yes, Gordan, it is exactly what I heard about the 10s from the sources that I found rational. The huge plate impedance and a need of very high ration transformer is something that might stop some people who would like to drive 10 full-range but for DSET application it might be a very good tube. BTW, there were a huge variety of the 10 rubes made. Even the 10Y – there were too many of them that were too different. I am still contemplating to get 40K-50K transformer and to try the 10s before I decide where to go with my amps for MF channel. No on sadly makes off the shelf 40K transformer with limited inductance for DSET applications…

The Cat


 Trying to build an OPT with a very high impedance becomes difficult at best. The capacitance builds up from the additional layers and you get a bad HF roll-off and slew rate limiting. While I was reading your post, one odd thought came to mind. Perhaps get a pair of 10K - 15K OPTs with 16 ohm secondaries. Wire the primaries in series and the secondaries in parallel. Just a thought...

 Regarding the 10S... the 1602 is a near identical replacement.

 Regards, KM

Rerurn to Romy the Cat's Site