I'm thinking of ordering a Triad C-14X choke to use in a GSG build. They're in stock at Mouser. I figure I can save on shipping by not having to source the choke from some other online vendor.
The C-14X is rated at 200mA, 6H, 150 ohms. The current handling is more than adequate. The inductance is higher than the suggested C354 in the GSG manual. I understand I may want to use 50 ohm parts at R11/R13, R12/R14 instead of the 51/47 ohm parts specified in the manual.
The 150 ohms DC resistance should mean it will lose about 11 more volts than a C354 choke. Will this be a big deal? Shannon mentioned something about the designed B+ of the GSG falling in a sweet spot, and I suspect everything was carefully tuned around that point.
If that doesn't complicate things enough, I've opted to go with the Edcor XPWR005 power transformer instead of a PA774. It's rated for 180mA at 660VCT with a 120 volt primary, but there's no telling where the actual working voltages will fall. I guess I should be prepared to tinker a little once I have all the pieces together...