Dynaco ST-70 Upgrades and prices
Prices below are valid with my restoration services
If you would like to upgrade your RCA
input jacks
with a new assembly using gold
plated jacks that are
wider in space to accept the
more modern RCA cables,
the additional price is $25.00 installed.
![Upgraded RCA input jacks](rcajack2.jpg)
Bias Balance Control Upgrade is a bias circuit upgrade for
equalizing
the bias current between each pair of output tubes. No need
for matched tubes. Installed price is $36 per channel
![Bias Balance Control](BBCU1.jpg)
Upgraded Speaker Terminals using dual binding post
wired for 8 ohm on your audio transformer.
Price installed $18.50 each side installed.
![Upgraded Speaker Terminal](speakerterminal3.JPG)
Upgraded Speaker Terminals
using four 5 way banana posts,
price is $28.00 each side installed.
![Upgraded Speaker Jacks](speakerterminal2.jpg)
Upgraded 3 wire line cord. Note, possible
ground loop hum may occur if your
input device (preamp, CD player etc.) also has a 3 wire line cord.
Additional cost is $11.00
installed.
![Upgraded 3-wire line cord](linecord2.jpg)
Other part
replacement prices
Replacement 10K 2Watt Bias Potentiometer $13.50 each installed
Replacement
on/off
switch $7.50 installed
Replacement mono/stereo switch
$7.50 installed
Replacement fuse socket $7.50
installed
Replacement same style original
Dynaco RCA Jacks $18.00 installed
Replacement original style Dynaco speaker terminals $8.00 each installed
Replacement Dynakit ST70
label for your cage $10.00
Sovtek 5AR4 tube $20.00
JJ 5AR4 tube $20.00
Ruby 5AR4 tube $20.00
Electro-Harmonix EL34 tubes
$42.00/pair
Electro-Harmonix EL34 tubes
$80.00/quad
Svetlana EL34 tubes with brown base $82.00/quad
New Old Stock 7199 tubes
$42.00/each
Pair of RCA input shorting plugs $3.00
Please ask about other upgrade
options and prices.
I can replace your original printed circuit board with
upgraded boards from DIYtube.com, VTA and others.
Email address is salb203@optonline.net
I use and recommend high quality upgrade and
restoration parts from Dynakitparts.com
Note: Tube prices subject to change without notice.
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updated 04/03/2014