Amazing, I have a Beckman 310 exactly the one on your desk, and I used it when I was restoring my PAS a few years ago. Your video is detailed and excellent.
You have such an awesome way of making a repair look so easy!!! I know how to solder etc but knowing the right type of repair is so important You amaze me every time I see you in operation You make it look so easy Thanks for another great video!!
Excellent video as always. I've updated a few Dynaco Pre-amps with parts from a place called UpdateMy Dynaco. I haven't restored my tube preamp yet. Too many irons in the fire for now. 73 NE5U Mike
I kept ALL my Dynaco gear.... PAS-2 (those same original tubes still there too!) with all new caps and elimination of the selenium rectifier. Mark 3 amps have all new caps including quad cap with 650v. rating and new diode rectifier for filaments... All made at the factory assembled in 1965 as stamped by the same tech... These run into a pair of 1967 Klipschorns (UNaltered)... Heck of a sound considering the year.... (O:
You bastard ... I had four of the Dynaco Mark III amps, three Kits I built and one factory assembled. I foolishly traded them in for later models of Marantz equipment. The Marantz stuff still works great with some TLC from me, a tech, but I wish I had kept them. I still have a Dynakit PAT-4 and a Stereo 120, but I miss the tube amps.
Those PAS units were real nice!! Had one myself and it was hooked up to 2 EICO 50 WATT amps with the EL34 output tubes.It was a real good system, wished I still had it today, but sold it about 20 years ago! John Bellas KC2UVN
Next PAS you do make sure to video. The board has been redesigned for right side up mounting and elimination of the rectifier tube if desired. Also no instruction sheet is included.
Terry, I admire your repair work. Real good work., but I have a little comment on one thing, I think your a more RF repair guy, no offense ment what criticism I make. I see you ground parts and wires where ever you can, normally and especially in RF it is required, a must have course of ossilation problems. But in audio it can be tricky try to lead all ground to a star point or even better to the input ground terminal. Then you never get 60hz hummm. I ones took a ground from point to point a lead from 2" underneath a pcb board and the Amp was bussing loud in my case 50hz (Holland) that's what I wanted to say. The rest you do top work I like it a lot.
Thanks for the great video! Thanks to you, I have done this upgrade and for the most part, everything is functioning properly. But now I have audible hum (which I did have before upgrade but it was very slight). Only connection is preamp to power amp. Not affected by volume. I don't experience it with other preamps that I have. Thanks in advance for any insight!
Before you mount the replacement supply board I recommend a foam insulation tape on the chassis and have the board seal on that it would be a much stronger assembly one Screw mount for that size board is marginal at best by adding the support below it makes it easier to do and stronger to
Looks like a PAS -3X ?,....as I see the small black caps coming up to the tone controls from the board. Very nice! You should do an Eico vs Dynaco shootout!
Great video! Years ago, my Dad gave me his PAS-3 as well as his ST-70. I have not been able to use it as the dual 750K balance control pot is seized and he broke it trying to use a pair of pliers trying to free it. I have searched everywhere and cannot find a replacement. Any ideas as to where I can find one? I replaced for him that exact same filter can back in '74 as the same thing happened. At the time, I got the same multisection one cheap. Of course if I can ever find that pot, I will install that new board.
Really nice job Terry. That board is perfect and is the only way to do it. Glad you sent Dick from the internet packing.... the motto for those who post RU-vid comments... don't be dick. Nice job as usual... Ron
Another good vid, However, I noticed that the wire hole did not have a rubber grommet in it. Did that concern you at all? Also, at the start of the vid, what is that piece of gear behind the Dynaco? An old O'scope perhaps?
Haha, you caught that! Well, my wife only drinks beer out of a bottle, so I used La-criox sparkling water cans. Wanted some type of crash during the troll's forced exit. Maybe next time I will try a stack of bottles. TD
I’m installing this exact same kit. I have a PAS2. My board is about 50% stuffed. I’m a solder newbie. The resistors I could bend the leads taught and then solder. The 4 large caps didn’t have much lead/prong to work with. They were short. I was a little queasy to have the 4 largest caps held in place by only solder. Am I just a worry wart? 🤖☠️
Nice job Terry! But Dick from the internet is saying He woulda left the original can in, for vintage cosmetics sake. What prevented the new board from being flipped to a more normal and convenient orientation?
Help Y'all - I just purchased and received a new SDS Pas Kit....one BIG question...there are 4 "diodes" in my kit...All the videos I see from Terry and others show this PAS kit exactly as I have BUT...his version clearly does not have any Diodes....I'm not totally smart about this...but can anyone explain what AND why they now send U the 4 diodes?? Many Thanks!!!!!!!!
Nice video... and it's a thumbs up from me for sure...BUT... I would have left the large filter cap in place, snipped all wires and leave it covering that hole now left behind. And the fuse and holder would have to be moved from the top of the board to the bottom side facing up for easy access should it ever blow.
Nine thumbs down? Wth You are local to me..less postal. I have a fellow ham I gave a hb100, 200 10-80 m set to re cap..he could use some help..He has had it for a year but still not on the air.. Kd8tbc Lee . He is on the Hazel Park 2m net 6.640 on Sunday. There is a echolink also. Surprise him..ha. 73, KB8QLZ Gary
Hi there, this is a great video! Thanks for that. I have what I believe is a PAS 3. The problem is when I turn it on, it does power up, the 12ax7's are very low but do light, the 12x4 is nice and bright...but no sound, through my Marantz. I tested the two transformer leads to the 12x4 with the AC side while plugged in, and nothing registers on my meter. There also is a weird low level crackling sound coming from the transformer, weird glue smell, but no smoke. The caps are original with no visible leakage. What is your assessment and thanks for saving my butt with this video by the way.
@@swinde Right on! I did end up purchasing a new transformer, haven't put it in yet, the fuse is next then possibly a couple of tubes and the power supply caps there isn't any leakage but I may just change em out just to be safe not ro hurt the transformer.
The other one is a PAS-2 which had a different fascia and plastic knobs, other than that same innerds. Not sure if they were both were made at the same time, I think it was a cosmetic update.
Don't change the tubes ! Unless you want to spend a ton of money on audiophile approved tubes. Those original tubes were Telefunkens and they last forever.
I always referred to the PAS series as the "Piece A Sh*t" series by Dynaco. I mean no disrespect at all to your video, it's just that I've owned two of them, and they sound truly horrific. The best adjective I can use to describe the way they sound is "woolly"....no high end whatsoever
