F2 Zen Type

aptquark · 21st June 2010, 11:11 AM

Hello everyone,

What can you guys (gals) tell me about this F2 Zen type amp? I purchased this from an individual who makes many types of Fx amps and chip amps. I'm just looking for comments about the tranny quality, caps, and any other info concerning quality or upgrading potential.

Thanks

Spiro

aptquark · 21st June 2010, 11:14 AM

more pics

aptquark · 21st June 2010, 06:01 PM

Dang! Where are all the Pass peeps?

Nelson Pass · 21st June 2010, 11:20 PM

How does it sound?

Zen Mod · 21st June 2010, 11:27 PM

ya made my day with another TR drek

Rodeodave · 21st June 2010, 11:31 PM

Why so impatient?

Well, anyway, here are my rather harsh comments:

Starting with the transformer...it doesn't look too big. 130VA seems pretty low. Toroidals are usually preferred due to their lower stray field.
The PSU's caps are standard Nichicon. Can't say anything about the resistors, at least the power rating should be okay.

The wiring is really bad, inputs in parallel, small diameter all over, nothing properly twisted or shielded and crossing at arbitrary angles. And whats with the cut wire (green-yellow) coming from the PSU board?

Is there even an earth connection? It looks like the chassis is floating. If this is the case it's very dangerous as this constitutes a shock hazard. I also don't see a fuse. This and the bare contacts on the transformer's primary make this amp a deathtrap. You seriously have to fix this if you want to use this amp. I wouldn't plug it in before these problems are solved.

The soldering looks looks sloppy, no trimming of excessive leads, no love.

Who builds something like this?

Zen Mod · 21st June 2010, 11:40 PM

Quote:

Originally Posted by Rodeodave

........

Who builds something like this?

Quote:

individual who makes many types of Fx amps and chip amps

Rodeodave · 21st June 2010, 11:52 PM

Quote:

Originally Posted by Zen Mod

... TR drek

Unfortunately it really loks like his work. Disgusting.
Might be a first for the usage of wood though...

aptquark · 22nd June 2010, 12:25 AM

Quote:

Originally Posted by Nelson Pass

How does it sound?

Not too good. Highs are distorted, bass is loose...mids suprisingly are ok.

Not a NP worthy device...this is what I feel like after listening to it

WHAT TOOK YOU GUYS SO LONG...jeez...

Anything I can do to improve it?

aptquark · 22nd June 2010, 12:26 AM

Quote:

Originally Posted by Rodeodave

Why so impatient?

Well, anyway, here are my rather harsh comments:

Starting with the transformer...it doesn't look too big. 130VA seems pretty low. Toroidals are usually preferred due to their lower stray field.
The PSU's caps are standard Nichicon. Can't say anything about the resistors, at least the power rating should be okay.

The wiring is really bad, inputs in parallel, small diameter all over, nothing properly twisted or shielded and crossing at arbitrary angles. And whats with the cut wire (green-yellow) coming from the PSU board?

Is there even an earth connection? It looks like the chassis is floating. If this is the case it's very dangerous as this constitutes a shock hazard. I also don't see a fuse. This and the bare contacts on the transformer's primary make this amp a deathtrap. You seriously have to fix this if you want to use this amp. I wouldn't plug it in before these problems are solved.

The soldering looks looks sloppy, no trimming of excessive leads, no love.

Who builds something like this?

I'm not impatient....

<bumP>

21st June 2010, 11:27 PM	#5
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	ya made my day with another TR drek __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

21st June 2010, 11:31 PM	#6
Rodeodave diyAudio Member Join Date: Dec 2004 Location: in the alps Blog Entries: 1	Why so impatient? Well, anyway, here are my rather harsh comments: Starting with the transformer...it doesn't look too big. 130VA seems pretty low. Toroidals are usually preferred due to their lower stray field. The PSU's caps are standard Nichicon. Can't say anything about the resistors, at least the power rating should be okay. The wiring is really bad, inputs in parallel, small diameter all over, nothing properly twisted or shielded and crossing at arbitrary angles. And whats with the cut wire (green-yellow) coming from the PSU board? Is there even an earth connection? It looks like the chassis is floating. If this is the case it's very dangerous as this constitutes a shock hazard. I also don't see a fuse. This and the bare contacts on the transformer's primary make this amp a deathtrap. You seriously have to fix this if you want to use this amp. I wouldn't plug it in before these problems are solved. The soldering looks looks sloppy, no trimming of excessive leads, no love. Who builds something like this? __________________ Gravity - Making the G since 13.7 billion B.C.

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21st June 2010, 06:01 PM	#3
aptquark diyAudio Member Join Date: Jun 2010 Location: MS Blog Entries: 1	Dang! Where are all the Pass peeps?

21st June 2010, 11:20 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	How does it sound?

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