All tested and matched. Sound is very musical and pleasant with good resolution. Price is for one tube, multiples are available. I have 2 perfectly matched quad and one pair available.
eBay
Dynaco ST-70 tube amplifier with upgrades! No need to match pairs! Electro Harmonic EL34 power tubes are installed with GE 7199 as driver tubes. All test good. And sound great! Sovtek 5AR4 rectifier tube tests excellent.
eBay
eBay
Complete with upgraded power capacitors and front-end driver. Driver uses CCS ICs to maintain proper Cathode current. The McIntosh speakers are not included.
eBay
This was engineered to be a restoration board and as such, follows the original circuit using the 7199 driver tube. Boards also went through a solder reflow process. This board is silkscreened with component values.
eBay
MKiii& AB, ultimate Dynaco MKiii upgrade kit. This kit will replace the original Dynaco driver circuit and printed circuit board, fitted 12AU7 triode.Tubes are not included with the kit! The benefits of upgrading your Dynaco MKiii amp with our are.
eBay
Vintage Dynaco 120 Stereo Power Amplifier AMP. Tested Works Fine on Both Channels. Good Condition. ???emailortext818-3141658.
eBay
This kit will replace the original Dynaco driver circuit and printed circuit board, fitted 6SN7 triode.Tubes are not included with the kit! MK IV& AB, ultimate Dynaco MK IV upgrade kit. The benefits of upgrading your Dynaco MK IV amp with our are.
eBay