Moderator: kabubi
brady wrote:"interesting to find out your results with the beta followers, so you have outgrown that allergy to sand? "
Hi Tony. Heheheheh. We even tried SS as drivers few years ago ala Jack E's 300B. TDA something. But we could not even produce an acceptable scope reading.
The 6SN7 in b-follower sounded "cleaner" than our earlier experiment with 6AU6. Or cascoded 6922.
I think the reason this specific amp sounds excellent is a very stiff, very straight power supply. And that became possible only because Edrel is patient... hehehehe
fld wrote:Edrel's iron is good stuff!! sounds great & very durable. I agree with Brady- it competes and even betters the imported irons for a lot less $.
Gaucho wrote:fld wrote:Edrel's iron is good stuff!! sounds great & very durable. I agree with Brady- it competes and even betters the imported irons for a lot less $.
+1......am using Edrel's power tranny for my amp
detubo wrote:Gaucho wrote:fld wrote:Edrel's iron is good stuff!! sounds great & very durable. I agree with Brady- it competes and even betters the imported irons for a lot less $.
+1......am using Edrel's power tranny for my amp
gayagaya ka naman sa akin. idol mo ako noh!?
(will try a parallel 182 to drive 2A3. 137v + and - at 20mA. It was Kit who set that operating point ... maybe Tony can chime in if he sees better point?)
Tony thanks for always valuable info and our always never ending discussion
tony wrote:...it's about time we have our own "Hammond" or "Edcor" transformer maker in the Philippines.....
AFAIK, he uses M6 lamination for his power transformers which is the minimum quality for use in output transformers and all the specified secondary winding voltages are spot on.
tony wrote:AFAIK, he uses M6 lamination for his power transformers which is the minimum quality for use in output transformers and all the specified secondary winding voltages are spot on.
Edrel uses Z11 or RM18 cores for his traffo builds, the Z11 is the equivalent of M6, both are of the 0.35mmm thickness, in comparison, Deeco irons uses 0.5mm thick laminates, thus losses per pound of iron is lower with Edrel's traffos....
so material wise, Edrel uses the same laminate types as that of Hammonds......
the difference is is in the design of the coils......i remember getting an inquiry from a member here about power traffos that one can "fry an egg" on....i remember old day's irons were like that....
so judicious application of well know principles in traffo building makes for a cooler running traffo, a cooler running traffo will be quieter and will have lesser radiated feilds than ones that you can fry an egg on top of......
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