15 watt Bassman 5F6A (ish) Build Started

[Commodore 64]

I'm building a Bassman inspired build based on the 5E3 PCB from ppwatt.com. Schematic, Layout, and other discussion of this build are at: http://www.45watt.com/node/15473#comment-146527

This build is based on 2 6v6 tubes, and there is some departure from teh 5F6A circuit. I put together a Mouser order. Please note that there's enough of each part for 2 builds:

Choke, Mosfets, Resistors, electrolytics, mica caps, power plug, fuseholder, switches, pilot lamps, pcb standoffs and screws, and OT blade connectors are saved to Mouser order:
http://www.mouser.com:80/ProjectManager/ProjectDetail.aspx?AccessID=5167372296
Or enter this code in your project page: 5167372296

I ordered the coupling caps, pots, tag strips, tubes, and tube sockets from AES (and a gallon of "Tolex Glue") AES also sells a plug with a fuseholer, part #: P-SP2-500 . I didn't see that when I made my order so I ordered a separate plug and fuse holder from Mouser. Again, I ordered enough parts for 2 of these builds, but this parts list should help.

http://www.tubesandmore.com/

Item Description Qty. Total
C-MD022-630 Capacitor - Mallory 150 M Series, .022 µF @ 630 V 10
C-MD1-630 Capacitor - Mallory 150 M Series, .1 µF @ 630 V 3
P-0802H Terminal Strip - 8 Lug, 1st & 8th Lug Common, Horizontal, package of 5 1
P-44 Dial Lamp - #44, T-3-1/4, 6.3V, .25A, Bayonet Base 1
P-ST8-193G Socket - 8 Pin Octal, Ceramic, PC Mount, Gold Pins 4
P-ST9-225 Socket - 9 Pin, Ceramic, PC Mount 4
R-R120 Resistor - Wirewound Power, 10 W, 120 Ohm 2
R-R250 Resistor - Wirewound Power, 10 W, 250 Ohm 2
R-R300 Resistor - Wirewound Power, 10 W, 300 Ohm 2
R-V38-1MA Pot - Alpha, 1M Audio, 3/8" Bushing 2
R-V38-250KL Pot - Alpha, 250K Linear, 3/8" Bushing 2
R-V38-25KL Pot - Alpha, 25K Linear, 3/8" Bushing 2
R-V38-5KL Pot - Alpha, 5K Linear, 3/8" Bushing 2
S-F316G Tolex Glue - 1 Gallon 1
S-H408 Nut - Wire, Small, package of 12 1
T-12AX7-S-JJ 12AX7/ECC83S - Triode, Dual, Spiral Filament, JJ Electronics 2
T-12AY7-GT 12AY7 - Groove Tube 1
T-12AY7-RCA 12AY7 - Triode, Dual, RCA Brand 1
T-6V6GT-TUNG-MP 6V6GT - Tung-Sol Reissue - Made in Russia, Matched Pair 2

Output Transformer: ClassicTone 40-18087 http://www.classictone.net/40-18087.html
Power Transformer: ClassicTone 40-18066 http://www.classictone.net/40-18066.html

Note that the schematic recommends 8k primary impedance on the OT, but the one I ordered is 6.6k. Not sure what the implications of this will be yet.

[Commodore 64]

I started this build over the weekend. My wife is mocking up a 16 x 2 layout for my faceplate before I can drill the front holes. Mouser didn't have any steel 16x8x2 chassis boxes, so I ordered 2 aluminum ones. In drilling holes last night, the aluminum was so freakin' nice and easy. Now I wonder why most people use steel boxes. Any thoughts? Also, the water-based Tolex Glue from AES is awesome. It's contact cement, works awesome, and cleans up with water. Love it.
http://www.lucky-cricket.com/files/5f6a_layout.JPG

Some of the holes are done, and deburred. I will mount the tube sockets in the PCB, then do a final fitting before I drill the holes for the PCB standoffs.
http://www.lucky-cricket.com/files/5f61ChassisDrill.JPG

My head cab is a little oversized. I glued it up wrong, so it added about 1.5 inches in the length of it, but it should still work. This amp will be installed "tubes up". The AES tolex glue was a pleasure to work with, compared to the hide glue/spray77/ high VOC contact cement I've tried in the past. No clue on what is in the AES glue though, as there is no label on it.
http://www.lucky-cricket.com/files/5F6a_cab.JPG

More to come, soon.

[markb]

Looks good so far. I do like a bit of rough. Err, brown tolex that is :).

I'd think that glue would be some sort of PVA formula. It works for bookbinders glueing leather and vinyl to boards so why not tolex to amps? Heat shouldn't be an issue.