interior of the amplifier. The audio-circuit is hardwired with prototyping
board as support. The cathode resistors for the output tube are of the new
type in TO220-package (partly visible left of the octal socket). All resistors
in the amplifier circuit are 2W metal-film.
The large capacitor at the left side is the filter cap for the heater regulator. The regulator itself is bolted to the chassis and a large heatsink mounted at the top.
|This is the high-voltage (150V) power supply unit. The upper, smaller board is the high-voltage regulator with slow-start (that replaces the choke).|
your tube - a Svetlana 6AS7G or a 6080WC from Philips ECG (made in US, military
grade, marked JAN).
The small one is a Sovtek 6922 (E88CC), used in the input stage. Any E88CC/6DJ8/6922 can be used.
|Complete interior of the amplifier. It looks little bit crowded, but it is rather spacy due to the box that are rather thick.|
|Complete amplifier, equipped with the Svetlana 6AS7. The visible capasitors are the 680uF used for the output.|
|Rear view of the amplifier. The heatsink is for cooling the heater regulator and the toroid transformer is for the high-voltage. The heater transformer is placed inside the box, right under the visible transformer.|
|Here is the 6080 used instead.|
|Tube porn - a close up of the setup with Svetlana 6AS7G + Sovtek 6922.|
|More tube porn - this time the 6080 is in place.|
|Here is a picture showing the open design of the 6AS7 electrode architecture. This tube (and the 6080) is a real glower - a perfect show-off tube.|
|Amplifier||Shows one channel only (other channel identical).|
|Power Supply||Both high-voltage with regulator and heater.|