Dynaco ST-70 Amplifier Restoration Project
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- เผยแพร่เมื่อ 7 ส.ค. 2024
- Here is the non-technical artistic version of the ST-70 amplifier restoration video for all to enjoy edited from the several full length videos that made up the original restoration. I make several of such videos a year for larger projects.
Derived from : Restoration Project
Part 1: • The Dynaco Dynakit ST7...
Part 2: • The Dynaco Dynakit ST7...
Part 3: • The Dynaco Dynakit ST7...
Part 4: • The Dynaco Dynakit ST7...
Part 5: • The Dynaco Dynakit ST7...
Music demo: Attribution/credit
bensound.com
#dynaco #st70 #tubeamplifier - วิทยาศาสตร์และเทคโนโลยี
I’m about 3 yrs late to this party, but just wanted to say fantastic job on the restoration. I’ve restored a couple ST-70’s over the years, so I understand what a pain in the *ss it can be. Nice touch with the PEC potentiometers for the bias pots. Beautifully clean wiring job. Cool you used new carbon comp resistors too. They certainly add to the sound of the amp. 🔊🎶😊
Thank you.
Your channel has everything! From servicing my V-star to tubes !
Now I need to make an EL34 powered Vstar
Fantastic! Incredible!!
Glad you like it!
Great job! Just bought my first (non working) ST-70. I'll be checking back often.
Congrats! good luck.... Caps and safety before anything else.
Oh my goodness! Here I Broadcast your video to my huge Sony 4K TV and just could not leave the lazy boy! So capitivating! I really enjoyed how you sand blasted and then the painted black covers. NUCE!! Sunday night October 4, 2020 a great night! Thank you!!
How did It look on the big screen. I never really review them bigger than my 48in monitor.
@@retrotechandelectronics very nice! It fit very well with in the aspect ratio! Vibrant colors etc...at times the quick edits were a little jarring but I understood the loss continuity causes that eye artifact distraction.I worked decades at the WB Television Network later the CW Network in the broadcast center here in Los Ángeles.
Perfect video for a Sunday afternoon !
Glad you think so!
Nice job on the Dynaco amp, but your Heathkit gear looks great too! 👍🇺🇲👍
Thanks 👍
Beautiful! Nice work, as usual. 😎
I'd definitely like to track one down or build my own ST-70 someday.
There are a ton on ebay.... it will hurt the wallet a bit.
Great reboot vid, thanks. By the way I loved the music...
Which music, in the end or during... the during music is somewhat of a contentious issue right now as I adjust my non commentary restoration videos to a LP background music format without getting dinged by youtube.
I'm making the gerber file for the circuit boards and the CAD for the chassis. I should have everything complete soon. The high prices of these parts drove me to do it myself . My transformers will be made by Mercury Magnetics, so they have a 10 year warranty. Now more people can enjoy an amp that's basic and affordable.
Yeah, today we have the luxury of doing it in a CAD program and uploading to a service to have it printed and delivered.
Very nice job! What preamp are you using?
Thank you. A PAS-3
That one "must of went" down with the Titanic. Good project if you have all time in the world and a sand blasting cabinet. That IS a replacement chassis ?
The chassis is stainless.
I just acquired an ST-70 Mark II, do you have any comment or any advice on how to keep this amp in good health? It came to me in box, completely mint with original tubes and "if used" not to any visible extent. I was able to bias the tubes and everything sounds good, but as I'm in the process of building an ST-70 kit from scratch I'm curious what you think of the diode vs tube rectifier design
Join this forum
dynacotubeaudio.forumotion.com/
Got it thanks I'm in :)@@retrotechandelectronics
Mind blowing work there!
Had a question about the lettering/decals (as seen at 4:36) i.e. Mono, Stereo, Left, Right etc. that is done after the chassis is repainted/chrome-plated. Where does one go to get this done i.e. what type of a person/business would do this lettering work, and especially on a powder-coated chassis...so that the letters will stick, and not peel/fall off?
Thanks.
That is silk screening a special process.
If anyone has a hankering to build a new virgin ST-70, there is an unopened, factory sealed kit at Echo Audio in Portland Oregon.. Think about it, brand new virgin tubes as well, including the now rare 7199 front end tubes.
The 7199 were an OK phase inverter. They are rare only because it came late to the game. Since then, a variety of current production tubes meet or exceed 7199 requirements.
Its like watching the Titanic being raised, crusticles et al
What input tube was that? 6GH8?
It is... 6GH8A electrically, a drop in phase inverter replacement for the 7199, only requiring those small adapters that reroute the pinout for physical compatibility.
I maybe picking up one soon, factory wired….would you be interested in restoring mine?
BK
Do you have any idea how much a rewiring of one of these amp cost?
not a TRACE of hum
indeed.
Awful music. I like how you keep your stripped wires short!
It's difficult to find reputable sources for LP background music that is not restricted, or getting bit in the ass month down the road with a copyright strike. I find myself mixing multiple tracks from verified sources for this purpose.
@@retrotechandelectronics - Suggest FREE music from NCN & NCS. Check it out!