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I have a PAS 2, just picked this up, PAS, no I haven't tried it, shopping for a rebuild kit, this has a completely different selector set up, is this post Dynaco, from a thread I found here? Not an X as it has regular pots for tone control.
If he breaks your heart I'll nail gun his.
Edits: 02/04/25 02/04/25Follow Ups:
And inside
If he breaks your heart I'll nail gun his.
All the filter caps as well as the filament rectifier need replacement. Those Black Cat coupling caps are highly suspect as well.
I just tried a different search for chassis images, it's a 3, so I'm thinking the sticker saying Dyna PAS it's a post Dynaco build by the hifi distributer that bought out the remains when Dynaco went under.
If he breaks your heart I'll nail gun his.
If it's a PAS-3, it's the original Dynaco company. The PAS-3 was produced in 1964-65. The PAS-3X came out in 1966.
"If people can't control their own emotions, then they have to start trying to control other people's behavior."
- Robin Skynner
I'm not sure what you are asking. The Dynaco PAS 2/3 preamp is a legend in audio. Update it and you are in for a pleasant surprise. Don't forget to replace the selector switch which leaks as it ages.
My personal experience is that a PAS got me back into tube audio. I bought one, updated it, sitting on my back deck. Tried it and it blew away the NAD preamp I was using at the time.
This is different from any PAS pics I have seen, (I have a PAS 2 that someone did an amazing job restoring ) the selector here is different. Thanx for looking.
If he breaks your heart I'll nail gun his.
It has been at least 25 years since I updated the PAS, but that looks familiar and I don't recall there being any circuit changes PAS 2 and 3. You have a lot of update options. I just read all I could at the time and picked what I wanted to do.
I built a PAS 2 in 1964 later updated to a PAS 3 and finally a PAS 3X. And there were only 2 differences between a PAS 2 and a PAS 3:
1. A nicer front panel and control knobs
2. A list price in crease of $10
Finally the only changes to a PAS 3X were new bass and treble controls that were out of the circuit at their mid point.
Thanks at least I get to make the monster. Been binge reading here today, lots bookmarked. The power trans and fuse holder ( Wahhh and LOL ) should be here this week for the 2. Deciding to keep this looking stock with a fresh can and flip, it's kind of rare now to find a virgin....Thanks for your time!
If he breaks your heart I'll nail gun his.
Hi Dphole, My friend Bob Gates did a mod on my PAS in 1990.I am slowly taking out what I don't need the path.He put in Wonder caps,yellow, to replace any Black Cats caps.,which were the original's as shown in your amp.He did not replace the 2 big selenium rectifier caps next to the transformer.Here is a picture...-.Mark Korda
Hi Dipole, the old Black Cat caps and the 2 big caps in the selenium rectifier next to the transformer are old stock. If someone was to do a mod those would be the first to go as they dry out in time.It does look very clean inside. Take care...-Mark Korda
Thanks, I was wondering if it was a 2, 3, or a post Dynaco build. But yes! it is as built. I finally identified it as a 3 from the selector switch. Ordering a can upgrade board, new jacks, LED pilot light. My other I just ID'd as a Dynakit build, I have to say with tone controls bypassed it is sweet. It is going to get Vishay carbon films at some point. Sadly, and my bad I didn't catch it, for all the money someone spent on that build Dynakit didn't drop in a fuse. Trans is on the way from Greece. PS from many posts here Dynakit's can cap is problematic.
If he breaks your heart I'll nail gun his.
It's an old, very original Dynaco PAS. It might have started out in life as a PAS-2 and then had the PAS-3 update which consisted of swapping-in the newer brushed aluminum faceplate and matching knobs.Again, it looks very original, which is rare. You might consider keeping it as original as possible while doing minimal restorative work. IMO, the hands-down best resources for original Dynacos are:
No business affiliation.
Edits: 02/06/25
Thank you! I have both bookmarked already, the Regenesis tone control bypass worked great in my 2, which is waiting on a transformer. Somebody spent a ton of money at Dynakit and skipped the fuse. And yes on my part hindsight.... I started looking at photos of the insides under Google shopping, the long shaft selector switch seems to be in random models, as you just hit the nail on head, now I am thinking the 2 and threes on the pics out there with that style selector must be rebuilds. I just ordered a recap kit which has a cap board with a cover to look OE. But I am going to get the Dynakit jacks board. Sorta like trying to find a 72 Riviera with a working 8 track.....
If he breaks your heart I'll nail gun his.
Something easily overlooked when using vintage gear is the AC mains. Vintage tube gear has limits. In the case of the PAS, there's a voltage chart in the manual, and the allowable AC mains is discussed elsewhere in the manual as well, if I recall.
It can be spot-checked with a handheld meter. But AC mains can wander significantly over hours, days and even longer periods. If manageable, I'd encourage the use of either a data logging meter or something that displays the AC mains voltage in real time. Power conditioners and similar things may have this sort of feature.
I am not sure why I would data log, but I use a 500w autoformer to drop to 110. Ditto the el cheapo Aliex preamps, the heaters are night lights at 122.
If he breaks your heart I'll nail gun his.
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