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In the Forum: Melquiades Amplifier
In the Thread: Single-stage Melquiades vs. DHT amps

Post Subject: Dht-dhtPosted by nl on: 11/30/2008

If one dht is good, two must be better?

I don't know. Some people like combining 6C45 etc with DHT, supposedly mixing the appealing qualities of each. Other people find that using a 6C45 (or other high-gm tube) with a 300B just makes a 300B sound like a 6C45. The DHT-DHT route (DHT driver) is very complicated and laborious. The results can sometimes be 'too colored." For other people, it is like combining roast beef with a good burgandy. It seems that many people these days have shied away from the high-gm driver tubes (6N1P paralleled, etc.) in favor of DHT-DHT amps. I am presently using 01A-71A-10Y-45.

I would suggest that, if you're going to do some DHT experiments, try DHT-DHT and maybe DHT-DHT-DHT. If you use an IHT, maybe 6SN7 or other 1940s "classic" tube rather than a 1960s high-gm model.

Something like AV20-PX25-300B can be good. Otherwise, maybe 6SN7-10Y-2A3 for example.

The AV20-PX25 combo can make a good two-stage amp if you don't need a lot of gain, such as for a horn driver. Even 10Y-PX25 will have about the same gain as a 6E5P or 6C45 used single-stage.

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