Dynaco ST-120

[pelly3s]

I have a couple of Dynaco's in my collection, and today my ST-120 caught fire. I never even got a chance to listen to the amp and I have had it for 6 months now. It bugs me a lot. If anyone has any good mods for it let me know. I also have an ST-400 I am looking to mod.

[Dick Hertz]

Possibly a blessing in disguise regarding the ST-120. Not one of Dynaco's best efforts. The 400 on the other hand is a pretty good amp. I'd leave it stock but if you really want to mod that bad boy, check out the Dynaco Doctor forum at, (dare I say it?, Audio Asylum).

http://www.audioasylum.com/forums/dynaco/bbs.html

[pelly3s]

I really want my ST-120 working again there is something I really like about it. I have it as a high amp on JBL 4430's, and it sounds great running a pair of horns. For now I have my Urei to run the horns. I will check out the website and see what I can find though. Thanks for the info.

[hifitommy]

does a nice mod to the st120. even though it wasnt one of dynas best efforts, frank does a nice mod that completely changes the amp.

[E-Stat]

...frank does a nice mod that completely changes the amp.

Quite literally. The only thing he keeps is the chassis! I once was the happy owner of a FET-5 rebuild back in the 70s.

OmegaStar 170

rw

[pelly3s]

i'm sure that is a great way to go, but i buy my dynaco's for the dynaco sound. i have started the tear down on it right now and i'm searching for parts right now. thanks for the help

[Feanor]

does a nice mod to the st120. even though it wasnt one of dynas best efforts, frank does a nice mod that completely changes the amp.

I owned an ST80 back in early '70's -- reputed at the time to sound better than the ST120 anyway -- and it was no killer even back then.

These relics are only fit for hobbyists with time on their hands.

[sota]

IThese relics are only fit for hobbyists with time on their hands.

You may be right and you can count me in. I have a PAT-4, 2 ST-80s, a pair of A-25s and a Quadaptor all with original manuals and in perfect operating as well as cosmetic condition. It's a dandy office/bedroom system with a sat. reciever, cd and a turntable. These are keepers for me since some of the pieces were built in the late 60s/early 70s by my dad who passed away on Boxing Day. Long live the poor mans Mac.