GoodSoundClub - Romy the Cat's Audio Site

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

Post Subject: The devil is in the details....Posted by floobydust on: 6/26/2009

A most interesting post... and I can see how things get altered based on incremental changes to resolve one issue only to find another down the road, which is often disguised by components which simply don't perform in a pure manner. I've not heard any of the 4V tubes you have so I simply have no ability to compare or comment. I do have much experience with the 45 however. I know for certain that all 45 triodes are not equal. Measurements, microphonics and sonics can be quite different based on the internal construction. I don't adhere to brand names for the 45 or 2A3 at this point... I've far too many which are cross-branded to render the branding meaningless. I guess my only real question here is: Have you found differences in internal construction for the YO186 and other tubes as exists with the 45 and 2A3? Also, can you describe which 45 internal constrution your particular 45s are? Perhaps a different one might change the overall (audible) performance.... impossible to know unless you try and compare.

Dismissing all of the above, it appears you have reached a design which meets your original design goals... well done. I am interested to know if you find any audible changes over time with the DHTs however... especially in contrast to the IDHTs in the rest of the amp.

Regards, KM

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