A long time a go a friend made a comment about the Dynaco PAS4 that the triodes on a ECC83 was parallelled. He did not understand why, i did neither
at the time. Now i know better.
The issue has been a thorn in my mind, especially as none of these amps
ever came to sweden, thus we had no experience of the amp and could
not say if it was good or bad.
A few years ago in a discussion with roy mottram a decision was to
make a few boards, i eagerly bought one.
Now time has come to realize this amp.
See Dynaco PAS4 klon where the build process is documented.
( it is a test-features amp, not all features will be implemented at this time)
Anyone with experience of a read PAS4 is welcome with experience of
a real pas4. Everyone else is of course welcome with comments.
One detail has interested me : the loop output.
The loop is a way to loop the signal thru an external tonecontrol box or
equalizer , where the loop itself is enabled with a switch. Thus for anyone
that don't want tonecontrol will not connect anything here. Others can
buy or build a tonecontrol box, connect it and use it at will. The nice with
this is that one can always disconnect the tonecontrol with a switch when
it is not wanted.
I have populated the board, done some repairs and slightly changed the
circuit by a few LED used to bias instead of the original somewhat
"kludgy" way of obtaining a small negative voltage.
Within a month i hope to have the box ready for use. I'll update the above
link as build progresses.
at the time. Now i know better.
The issue has been a thorn in my mind, especially as none of these amps
ever came to sweden, thus we had no experience of the amp and could
not say if it was good or bad.
A few years ago in a discussion with roy mottram a decision was to
make a few boards, i eagerly bought one.
Now time has come to realize this amp.
See Dynaco PAS4 klon where the build process is documented.
( it is a test-features amp, not all features will be implemented at this time)
Anyone with experience of a read PAS4 is welcome with experience of
a real pas4. Everyone else is of course welcome with comments.
One detail has interested me : the loop output.
The loop is a way to loop the signal thru an external tonecontrol box or
equalizer , where the loop itself is enabled with a switch. Thus for anyone
that don't want tonecontrol will not connect anything here. Others can
buy or build a tonecontrol box, connect it and use it at will. The nice with
this is that one can always disconnect the tonecontrol with a switch when
it is not wanted.
I have populated the board, done some repairs and slightly changed the
circuit by a few LED used to bias instead of the original somewhat
"kludgy" way of obtaining a small negative voltage.
Within a month i hope to have the box ready for use. I'll update the above
link as build progresses.
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dynaco PAS4
Hello
have you build the dynaco PAS4 clone?
I own one original Dynaco PAS4 and I am curious to see the clone
Hello
have you build the dynaco PAS4 clone?
I own one original Dynaco PAS4 and I am curious to see the clone
You have an original !
Mine can be seen at the link above. It shows the build process and the final
unit. It has been on circulation with a few audiophiles, with positive
comments.
I have an original PAS4 that is in perfect shape but is in the midst of a rebuild. All caps replaced with newer models, bypass caps replaced with Solen films bypassed with Russian PIO's. Face plate perfect. I just can't seem to get around to finishing it I have pictures of the main board and all parts. Do you think it is sellable as is... or do they have any value at all?