pictures miniblok 1 and miniblok 2 by fred nachbaur

[chopchip]

just thought i would post the pictures since i bought a camera. hope you like.

[mwiebe]

Look nice, especially like the P-P. Looks like you have rotated them through the same system, I would like to read what you hear as differences between the two.
Matt

[chopchip]

Originally Posted by mwiebe

Look nice, especially like the P-P. Looks like you have rotated them through the same system, I would like to read what you hear as differences between the two.
Matt

the SET amp definitely colors the sound, like that 50s clean guitar sound, but it is nice and the bass is very full for a small little amp like this. the PP is 3.5 watts vs the 1 watt and sounds more accurate. im still waiting to put in some better bypass capacitors on the cathodes. the ones i put in are low quality. i probably prefer the PP, it is clean and very HIFI to my ears. on fred's web site he compares the outputs and the harmonic frequency graphs and the PP is much lower in first order harmonics and the output frequency wave is almost identical to the input signal whereas the SET it is somewhat rounded.

thanks for commenting.

[mwiebe]

Graphs are not the best indicators of sound. I've been wanting to do a little P-P like that so I'm encouraged by your comments. Depending on how efficient your speakers are the SET could be straining a bit. My 6EM7 SET sounds great on La Scala but sucks on mini monitors.
Matt

[chopchip]

Originally Posted by mwiebe

Graphs are not the best indicators of sound. I've been wanting to do a little P-P like that so I'm encouraged by your comments. Depending on how efficient your speakers are the SET could be straining a bit. My 6EM7 SET sounds great on La Scala but sucks on mini monitors.
Matt

i'm running them through a pair of celestion 5s vintage speakers they are about 89dB and it sounds great to me. yeah some of those very sensitive klipsch speakers would be fine but not necessary for my needs.(it is tempting though)

if you build the PP have fun and enjoy it does sound very good.

[TGriffin]

Excellent job! I like the look.

I've been gathering parts for the pp version myself as a first shot at building a tube amp. What did you use for an output transformer?

BTW, if you need tubes, Surplus Sales of Nebraska has NOS GE 13EM7/15EA7's for $3.

Tom

[Cassiel]

Very nice. Doubly nice when I think I did help a man who has good taste.

[Zen Mod]

I'm glad that Fred's gadgets are still interesting to ppl



some links and Fred's picture

[Cassiel]

Yeah, too bad good men are the first ones to go.