For-Sale: Amplifier (Tube) Post an Ad
Flag Ad: Miscategorized  Spam or Suspicious

Dynaco ST-70 Stereo Tube Amplifier, reduced price!

Price:  $1,000.00
Days/Views:  0 / 1368 (Posted 2024-07-15)
Condition: 6/10 Good
Accessories: Manual
Seller:  Rod M   (Contact Seller)
(Other Seller Items For Sale)
Feedback:  5.0/5.0

The Dynaco ST-70 is a classic. I bought this amp from M3 Lover back in 2019. Tim had bought a new quad of JJ EL34 tubes, but hadn't done any other restoration or upgrades.

Since then, it's been re-capped. In addition, the RCA input board was replaced to allow space for proper cables. Finally, Eli Duttman's series SS diode tweak was done to provide extra PIV headroom and protect the tube rectifier.

Also, John Pons went through the entire amp checking resistor values replacing as needed and re-soldered some joints. After setting bias, John claimed a solid 35 watts per channel and the unit sounds great and is dead quiet.

The old 7199 tubes will be included along with a set of 6GH8A tubes with the 6GH8A to 7199 adapter. The amp currently is using Dynaco labeled RCA 7199s that I bought from eBay that test strong.

Lastly, John replaced the cage screws with stainless steel knurled knobs which are handy and quite nice.

The cage is in very good condition. As with most vintage electronics, the case shows some pitting and rust, but the electronics are good to go for many years and it sounds wonderful.

The only reasons that I'm selling the Dynaco is that 1) I have too many amps and 2) I got enamored with the McIntosh MC-30 monoblocks.

I also have the original Dynaco manual with all the instructions for assembly, schematics and wiring diagrams. Tim had also given me a lot of other info on modifications and other articles.

If you'd like more pics, let me know.

Payment and Shipping
Pay By: Paypal, Visa, Mastercard, American Express, Discover
Ship Weight: 35 lbs.
Ships From: 92085 (Vista, CA)
Ships To: USA Only
Shippers/Payer: UPS, FedEx, Postal / Paid by: Buyer
Shipping Notes: (none)

More Seller Info
Seller:  Rod M   (Contact Seller)
(Other Seller Items For Sale)
Membership:  Webmaster (Contributor since 1999-03-01)
Asylum Feedback:  5.0/5.0
eBay Feedback: testflight
Location:  So. California,
Registered on:  1999-03-01
Posts:  16433

Contact Seller

[ Terms of Use ] [ How This Works ] [ Contact Us ] [ Support/Wish List ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]