My first post here.
I own one.
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muncybob wrote:I just joined the forum. Currently running a PAS-4 on loan to me and comparing it to a Conrad Johnson PV2. Have not run phono yet(waiting for my stylus to arrive) but cd's sound great compared to my old Rotel preamp. I am quit surprised that for less than 1/2 the cost of the CJ, the PAS-4 compared very favorably. It has a mixture of tubes in it and needs some cosmetic attention.
I'm seriously considering buy this preamp, I believe the seller wants around $300...is that a fair price? I hesitate only because I'm not sure how much $$ I'll be at with new tubes and possibly having caps replaced due to age?
muncybob wrote:Forgot to mention, the Dynaco currently has the following tubes, one unmarked and one marked 82219(line?) and in phono Tungsol 12107, Sylvania 34167, 82219 & 6DJ8(?)...I am lost as to why so many different tubes but I'm a complete newbie to tubes. Are there preferred tubes for the PAS-4?
The Mrs said it was a fine line between the PAS-4 and the PV2 with slightly favoring the PV2 on cd's, plan to play the tt soon. BTW, what does PAS stand for?
Yes, they are interconnected internally.muncybob wrote:Can the 2nd output be used to run a powered sub?
muncybob wrote:I am surprised for as good as this amp sounds there is not more discussion regarding the PAS4.
It was appx $825 and sold by a NYC discounter. I bought mine for $525 new from a wholesaler, who was stuck with the stock, when they didn't sell. Mine had chromed knobs. There was also an an all chrome version. I sold mine for $375, because I only listened to the linestage, which, as [i]tubes4hifi[/i, states, was moderately good. The phono stage was superior and included a scratch filter. My bad.muncybob wrote:Curious to know what the original retail price was?
muncybob wrote:Thanks for the info Bob. I am confused and if I knew how to read a schematic I guess I could answer my own questions...I have read talk of 2 tubes in the phono stage and elsewhere talk of 4 tubes. Which tubes are phono and which are line stage? Although the amp was checked by a tech and he said there is no problem with the caps I suspect that due to age it would be a good idea to start replacing them? You mention a good starting point would be the 2 line stage caps...exactly which ones are these?
Also read talk of putting some PQ 7308's into the line stage and RCA 5751's in the phono. What would be the general consensus of replacement tubes without breaking the bank?
I just finished giving the metal case a new paint job and cleaned up the face plate nicely. Now have some metal knobs on order to make her look like new.
tubes4hifi wrote:it's been awhile since I looked at this thread, so replying to some of the OLDER questions . . .
no joke - PAS stands for Pre Amp Stereo; PAM (as in the old PAM-1) stands for Pre Amp Mono
Several years ago I tried to sell a clone of the PAS-4, I had a few PCBs made, never ever sold one.
If I had to do it again, I would redesign the power supply section using modern devices, but keep the rest of it the same.
But a guesstimate of price would be north of $1000 for a kit, since a new PAS3 kit runs about $700-800.
The PAS-4 has a lot more controls and switches, and much better circuit design, also needs a lot more power to run it.
I think my SP12+PH12 will beat it on performance for about the same cost.