1 |
After replacing the filter caps with new short caps the filament transformer fits above them on standoffs. |
2 |
Making room for the retrofit - the plate choke and capacitors will also come out temporarily. The RF deck chassis is cut out through the existing holes. A jigsaw was used in this step, cutting from the bottom side, using a magnet, compressed air and a small vacuum cleaner nozzle. Note that the antenna relay and the power sensing board have been removed. |
3 |
This is the first attempt at the sub chassis. |
4 |
Bottom view of the tube sockets mounted on the sub chassis. Still
needs lotsa solder lugs and tie points. |
5 |
Top view - the aluminum angle will support the plate choke and doorknob capacitors, and will be the mount for the air dam between the
tubes and tank. |
6 |
Another view with plate choke in place.
|
7 |
Temporary installation in the 2500. Note T/R relay mounted on
vertical panel.
|
8 |
A view with tubes installed. The left side panel will be trimmed to
give the GI-7B anode more space. |
9 |
Bottom view of the sub chassis. The 8 threaded spacers will rest on
the bottom cover, giving support when tubes are installed. |
10 |
Bottom view showing proximity of cooling fan to anodes and sockets. |
11 |
Sockets and air dam installed. The power board and T/R relay are mounted on the Plexiglas air dam. |
12 |
The existing doorknob capacitors will be relocated a short distance to the side panel and angle. |
13 |
The power board is temporarily mounted with longer screws. |
