Rerurn to Romy the Cat's Site
In the Forum: Melquiades Amplifier
In the Thread: Single-stage Melquiades vs. DHT amps
Post Subject: The Unexpected problem with DHT Milq.Posted by Romy the Cat on: 4/13/2009
fiogf49gjkf0d
Do you know what I did for the last 4 hours? I was soldering one freaking cathode resistor for Milq DSET and was trying to figure out why the voltage does not drop on it. Do you know what the problem was in the end? The problem was that I just forgot that my filament transformers have center tap grounded. What a find!!!
Ok, it look like it is not a big deal and I might lift the ground on the filament secondary. However in this case the IDHT tunes heaters will not have reference to ground. I do not like completely floated filament. Well, they will not be completely floated but will have some reference via the DHT cathode but I do not know if it is kosher. At least need to re listen everything to see if it works.
I have two alternatives. First is to put a new DH filament transformer for 2.5V, 4V and 6.3V. The second solution is to put from my grounded 6.3V that I use for my IDH tube another transformers that will convert 6.3V into 2.5V, 4V and 6.3V only the secondary will be galvanic decoupled.
I am still considering both solutions…
The CatRerurn to Romy the Cat's Site