|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
72.221.121.200
Greetings- I was under the impression (because I read it on the internet, so it has to be true !) that the larger Peerless output transformer (16458 ) that was used on the W5M was the "better" one, due to a larger core and higher bandwidth (I think?) than the smaller 16309. Today I read (on the Allegro Sound Website) that "the Special Peerless 16309 nickel-core output transformer is preferred because [below *]
(* later production used less-costly 16458 xfmr).
So which is it ?, has anyone actually tested these two transformers and compared the specs. This is realy bugging me. Thanks, wpod
Follow Ups:
MagnaQuest sells nickel stripe audio transformers.
Absolutely the 16309 is the better sounding transformer mainly because of the nickel core but it is also a 1khz higher impedance than the 16458.
The biggest reason for failure of the 309 transformers was simply because people didn't change the original leaky coupling caps and balance the KT66 tubes in the amp. When the coupling caps became leaky,they would put DC voltage on the control grids causing the output tubes to draw excessive grid current that went beyond the 25 watt rating of the output transformer.This caused it to open up on the outer winding to center tap.
Honest amplification is better than excessive 2nd order distortion anytime.
Over years of experiments using pentodes or tetrodes, the amplifiers sounded better by increasing the tube manufactures recommended plate to plate impedance. Manufactures figures were focused on maximum power output. The amplifier dampening factor also goes up with higher plate plate to plate impedance.
Absolutely! That is why I mentioned it and you do lose power with higher than typical impedance for a particular set of output tubes but you almost always gain in bandwidth and lower distortion.
Honest amplification is better than excessive 2nd order distortion anytime.
I have always heard that the 16309 had better highs but were fragile and easily shorted.
John Atwood tested both of them years ago and his findings are in the pdf linked below.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: