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

Post Subject: I do not think that it might be damaging…Posted by Romy the Cat on: 4/22/2009

CV,

Good scenario as well but my leading idea is slightly different. I would like to keep any reactance from the path, would it be inductive of capacitive, to assure ultra fast response time. Basically I would like to maintain the MF amp as it used to be – a single stage. There was a guy in the beginning of this thread that crawled to this site from underskirt of that always lying Oswald Mill whore, and he advocated the concept that an amp needs to be with multiple stages, unitizing a multitude of ways to shape and Sound in order to cook the thick broth of desirable Sound. I have seen him and other expressed the same view before but I do not think I support this view. I do not know of that guy practice DSET concept but if he did then I think he would realize that for FH channels the cleanness, ultra fast transients and “natural” speed of signal is very beneficial. I did hear some direct-couple amps where I like the cleanness of MF very much. They had other problem but the MF was very much as I would like to. I do like the cleanness of my single stage amp – it VERY clean, I just need more power to convert it to less loading.

I do not claim that some very vintage DHT direct-coupled with my driver will do what I would like, I just do not know. However, the idea of having as less as possible reactive elements in signal path is sounds as the BS that I would subscribe intellectually (for limited bans of DSET), let just see if it turn out to be effective in the live of real Sound.

Since a guy I know, proposed a very good scenario how to kill the gain at input in the filter (by taking signal out from the taped choke) I tried to DC-couple my stages. I was not successful. There are many DC-coupled ideas out there and the amps are very simple. There is a book by Jack Robin and Chester Lipman from 1947 that suggests one of the versions.

I was adapting it for my driver and… burned 2 test 2A3 tubes. Then I asked a friend of mine to help me with calculation of my DC-coupled amp. So he did, proposing some of his own advancements. I have the circuit already and will be experimenting with it sometimes later on this week. It looks very clear and elegant, though I have no idea how it will sound. The amp is very basic with cathode bases 6E5P. I have no prejudices against this cathode as it is not bypassed – so there I no cap. The unbypassed driver has a half of gain that serves a lot of benefits in my case. The circuit has some “kinks”, that is why I do not post it. The friend of mine plays in industry and I am not sure if he would like me to publicize his ideas. Still, it is very simple and very concise – very far from elaborate pile up of stages. It is pretty what I had before but with no Innerstage transformer – I do not think that it might be damaging…

The Cat

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