Demo D-Lab ST-7 Tube Home stereo amplifier, modeled after Dynaco ST-70 Evolving Project low power

So, this question has been on my mind for years, can the Dynaco ST-70 driver board be utilized for other output tubes. The answer is Yes! Had to make a few minor changes, but she charged out the gate playing, sounding superb! Take a listen to the demo. The 6005W tubes really have nice dynamics and best of all they are inexpensive. As you know, the Dynacos and others are commanding high prices these days and require upkeep. But on the other hand people are not listening at high volumes. They want lower cost/higher reliability and smaller amps for their apartments or office. This design fits that need. Great sound at low volume. Perfect for running a turntable with. I am updating the schematic as the project grows. Note: If you wanted higher power, say 12 watts per channel, this amp can be updated to 6V6 tubes. The power transformer has well enough current to support them. Down side is you would have to install larger output transformers and of course foot the bill for 4- 6V6 tubes! I am planning to update the output transformers to Hammond 1608's. Hopefully achieve better dynamics. When complete, I will generate a follow up video.

[Yugedrums]

Take care of yourself Terry, and make the videos when you can. We’ll always be here watching.

[Bbendfender]

Sorry to hear about your health problems Terry. I'm about to turn 74 and I have problems with my legs and my stamina. Love your electronic ideas and your knowledge that you share. I wish you the best.

[scottohta]

Terry sorry to hear that you are feeling down. I've learned a lot from you over the years. Hope you will feel better. Hang in there the world needs good people like you.

[EricNusbaum]

Hey Terry -- I've been watching your videos for years now, and sincerely appreciate all the effort you put into them and the details/knowledge you've shared with all of us. We appreciate all you do for us, even one video a week is incredible! Hope you heal up and wish you all the best, and most of all -- thank you for all that you do!

[ScottMicciche]

Take care of yourself, Terry. The great thing about your channel is being able to re-watch the already-outstanding content if you're unable to produce videos as frequently.

[JamieBulloch]

sorry to hear of your struggles, i am rooting that you get everything resolved health-wise sir, love your channel, as my dad would say, , , just do what you can son, we understand....

[fiddlix]

I’m with you Terry. I just turned 64 and I have a boat load of “old man” problems. I hope you feel better soon.

[edwardhannigan]

Hey Terry, Great amp and info as usual..Sorry for your health issues..We are all rooting for you to heal as soon as. Love your videos and your humour, keep strong my friend and do only what you feel comfortable with..Thanks for sharing your expertise as always..Ed..uk..😀

[mndean]

Yes, do the best you can. It's no fun. It's have rheumatoid arthritis myself and just developed epilepsy. The RA is exactly how you describe it.

[DeadKoby]

6GH8A is what I put in my Seeburg Jukebox. It was supposed to have 7199, but I got an adapter from CE Dist to make the switch. Best wishes on managing your health issues.

[curtisphilumalee]

No apologies needed Mr Terry. Taking care of yourself should always remain your number one priority.

[tedcollins]

Nice work! Your design doesn't overload the rectifier, like the original. I kept a voice of music that uses 6aq5s, sold the 6bq5 version. Good music too.

[stevebrown]

Sorry for your troubles, I will keep you in my prayers.

[electrolytics]

Thanks D Lab. Hope you feel better soon. This looks like a cool amp.

[jmsbriann]

Good job Terry! I too had knee issues, arthritis was mentioned also by doctors. I found I had low testosterone, my muscles had relaxed and or shrunk to allow my knee bones to have little or no cushioning. My knees and hips are doing just fine these days at the age of 66. Good work shoes or boots, rubber mat under where you stand and a stool for when don’t need to stand was advise from a sports doctor until I was properly diagnosed years later. Painful Swollen knees were part of it from time to time. Just thought id pass it along!

[GIBKEL]

Sorry to hear brother. I’m looking at an old 59’ Magnavox Continental Stereo. Can’t seem to find a schematic though. Big 2 x 15” P232 and horns.
I hope you get to feeling better. It’s been a hard winter. Damn bodies. I’ve been suffering with MS since my teens but doctors couldn’t
(or wouldn’t) ….definitely didn’t figure it out till a coupling years ago. Have faith in oneself.
Cool project you made there.

[CH_Pechiar]

Terry, get well soon. I really enjoy your videos.

[rustyrobinson]

I know how you feel about the painful knees thanks

[RobGiordano]

Loved my Dynaco stuff, wish I still had them. Thanks for the video!

[ΑργυρηςΚαραπετσας]

Such a great knowledge you give to us. Thank you very much and get well soon!