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Anyone know what finals are in this? Just wandering if a 2078 would work! Thanks for any help......

Anyone know where the keying transistor is loc. on the board? Number on board? thanks for any help..........

Anyone know if I can remove the output pills in this & use 2SC2879,s in it? Just wandering... Thanks, for any help.

Anyone know who makes this amp? I been looking for a sch-matic or drawing of the inside......Thanks for any help.

Question: I,m needing to check these pills and need to know the steps to do so, I have digital ohm meter: Does it have to be out of circuit also? Thanks for any help.

Anyone know the location of the power pot (number on board)? Thanks for any help..........

Whats makes my 750 stay keyed-up, but not all the way? It will un-key but my recieve will not come in until I switch the hi/lo switch to off pos. When I flip the switch on it keys up! Any help please......

can anyone help me to set the cathode current on 8950 tubes? This is 1 preamp driver and 2 drivers driving 6. Looks like all are jumped from pin 2 and pin 6. But has the adjustment just under the preamp driver, white square looking with a metal flathead screw....thanks for any help.

Can anyone tell me how to adjust the driver cathode on this maco 750 under it where there is the adjusting screw, square looking adjustment?.....thanks for any help

Anyone know the value of the resistor that ties to the input from the radio where the jumper goes? This one is burned. Looks like may-be someone tried to drive it.............Thanks for any help....

I have a 2950dx and all of a sudden it only dead keys 1 watt and modulates to 8 watts! Can anyone help me and point me in the right direction as to what might have happened to this? thanks for any kind of help........

I have a 2950dx and all of a sudden it only dead keys 1 watt and modulates to 8 watts! Can anyone help me and point me in the right direction as to what might have happened to this? thanks for any kind of help........

Can anyone tell me where the power & mod. pots are on this thing........thanks for any help

I have been doing some researce,and I see if not mistaken. I can take a 8950 tube and exchange the heater pins 1 & pin 12 from the socket,and place a 6lf6 in and use it in place of the 8950! 6LF6 is just a broke down verson of the 8950 but at 6 volts........any thoughts

I got a no name mobile box that has 8 sc2879 in it and need to know what kind of amps I need to operate this? They had a boomer 400 with 4 MRF455 pushing it, I think thats a little to much! Would 2 reg. automoble batt. power it? How many watts should I be looking at? ........Thanks for any info...

How do I by-pass the 6CA7 driver on the jb 2000? thanks in advance

Could someone send me a few pics of the under side of a jb model 2000 base around the relay area and switch area? Someone has cut away the wiring, and around the 6ca7 driver circuit, and stand-by, all have been cut. Thanks a millon in advance.......

Can someone tell me how to check the keying trans. I did replace it with the same one....need to see if it is even getting power to key up,power reading,s...etc. Or how to jump the relay to see if it will key up ,I can key up mike & oush in on relay with a pencil eraser & get good out-put RF...

Can anyone tell me how to jump this relay, just to see if it will kick in.....when i key the radio, it want kick in,but i can push it in with a pencil & it will show wattage,but does not kick or click in. Its a 110 volt, I have replace the keying circuit,plse. help....thanks

can someone send me some pics. of scout 20 4x4 of the under section, i have a wire off and need to find where it goes. thanks.