Agreed Jim! 3 amp diodes are an overkill on the SB-200 and SB-220. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailma
Think about this again... Please send your math that supports your claim below as to current draw (3 to 6 amps 60 times per second)? Also, please take a look at the schematic of both the SB-200 and t
2 hots, 1 neutral and 1 ground. Not really the proper term though. It's more properly named 120/240 single phase. With 120/240, you need a neutral. And a ground of course. 73 Jim W7RY _______________
No.. The proper name is the plate power supply FILTER choke. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list
Metal Supermarkets. (Would have been nice if he had spelled it correctly) http://www.metalsupermarkets.com/ 73 Jim W7Ry _______________________________________________ Amps mailing list Amps@contesti
SB-200 or SB-220. The tube in the SB-230 is no longer made (8873). 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailma
And.... Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Negative Carl. The upgrade was to simply save the power switch. It installed a relay to switch the high current AC carried by the front panel switch. 73 Jim W7RY _____________________________________
Ok Carl... The kit is Heathkit part number 830-94. I is simply to increase the capacity of the power switch with a relay. This guy is so miss informed (like me so YOU say) that he installed the power
Carl. Here is a place to download the entire service bulletin that deals with the switch enhancements using a relay. HL-2200-AC Service Bulletin is located at http://www.tech-systems-labs.com/heathki
Carl. Please explain the step start function of this relay and modification kit. Also, please provide a schematic to support your claim as I have done the same to support mine. 73 Jim W7RY __________
There are LOTS of non inductive resistors out there (thick film etc)! Consult the Mouser catalog. Download a Mouser catalog at www.mouser.com 73 Jim W7RY _____________________________________________
EBay. There is a fellow on QTH.COM who buyers and parts out TL-922s. BTW the TL922 transformer was never removed when Kenwood shipped them. Just the tubes were removed. The would have been something
What frequency have you been operating on? What other sort of mods have been to the amplifier? Is the plate choke stock or has it been rewound? 73 Jim W7RY ___________________________________________
Isaac. I attempted to re-wind an Ameritron choke and was not too successful. I did not have the EXACT size wire that was on the original choke. That makes a huge difference. I would attempt to re-win
The end of the shaft sizes are 1/4" and 3/8" . The cap itself has 1/4-28 threads (1/4" 28 threads per inch). Most of the "nose cones" are the same size. Sometimes the 3/8" shaft end is just an adapte
Get out your calculator and figure out how much of a dB/S-meter increase 1100 watts is above 800 watts. Then YOU can make the decision. 73 Jim W7RY _______________________________________________ Amp
Simply drill holes into the finished chimney then use nylon screws to hold the Teflon together. Works fine. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesti
Does anyone have a source for imported 8877 tubes? Has anyone had any in service? How did they do? Thanks! 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contestin
No need for a keying buffer. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps