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the other unit has the pb1189 audio board in it. will they interchange? this may have something to do with it. the guy i bought it from brought me the power cord to this unit today, i was using the cord from the other 101 to troubleshoot it with. as soon as i plugged this one up, with the...

thanks for the ideas, i will check into it. i was thinking the tubes were the finals only. i have another 101 here and it will receive with no tubes installed. i will try it with them pulled out. thanks no rx with tubes out either. i forgot to mention that i have wiggled and tapped all...

Hello, I have a yaesu FT101EE late model 25001+ serial. No rx, and very little tx, maybe 1 watt. I suspect tubes on the tx. First I want to tackle the rx. I have no noise or static on internal speaker, external speaker, and headphones on any band or mode. Absolutley nothing at all. This...

i was working on a 2510 president a while back. the driver is a 2sc2166, just like this one. the bias setting on it was 50ma. why would the cutoff be different in this radio with the same transistor? different circuit? because of the 2290 final? i thought the 50ma was to cut it off, mabey they...

thanks for the replies, the 2290 dissipates 175 watts of heat and the 2879 dissipates 225 watts of heat according to the datasheets. that is if i read it correct. i was not going to run it full out. maybe 60-70 percent. depends on how it acts. i see vr11 in the corner of the board next to...

hello, i just replaced the final in this rig. i was looking for the info on setting the driver and finals bias. anyone know the procedure, and voltage? thanks and happy new year oops...i forgot to say i put a 2sc2879 in, because i had no 2sc2290, thanks

ok with no transmitter hooked in line, just the receiver only. shouldnt i get receive if all is correct? thanks

well these definately have tubes. tx and rx. according to the schematics they are supposed to have tubes. unless the schematics on cbtricks were mislabeled or something. maybe im wrong tho, i never was too good at reading those things. thanks for the reply. merry christmas to all

hello, i have some questions about this pair. i got a set of these the other day with no relay in the transmitter, completely missing. i was hoping someone would know the replacement number for this or a substitute number. i have found replacements for about 30-40 bucks, but i have a box of...

thats where i checked it. usb, 28000 mhz, no mod, jumper board out, etc. like the manual says. thanks for the input rogerbird. i need all the help i can get.

alright i have got the tx back. (it was a wire loose i didnt see last night) ok i thought i would check the bias on the driver and final. i cant get any change at all on vr112 or vr113. thanks

ok i meant t1 instead if ic1. anyway i changed t1 from a parts chassis i have, and now i have no tx. no tx light on the front either. i changed it back to the original still no tx. i looked for a loose wire, but didnt find any. i have put htis thing to the side for now. thanks

hello, i have another president 2510. this one receives good, has about a 7w carrier, but no modulation. i have checked the obvious like the mic. i have another one mobile and it works fine, so its not the mic. i also have replaced the 2 capacitors that usually cause the no mod problem c95 and...

just thought i would add, that i have done the mod and it seemed to have fixed the problem with it. thanks again

again guys thanks for the help, just stopped back in to see how its going. great thread and THRILLED to see it sticky now......i thought of suggesting it the other day because of all the useful info in it. glad some else agreed with that. shockwave i cant thank you enough....im going to dayton...

w5lz (doc) you make alot of sense there for sure....... i have had some experience with the input and output impedance differences and problems that can occur with them. im not going to say who is right or wrong. i am just thrilled that i have gotten so many great responses and help in finding...

i found the thread. its a good read too. thought i would link it up, being that it paints a picture of one way to fix this problem. http://www.worldwidedx.com/amplifiers/42085-2-pill-low-dead-key-makes-amp-hang-up.html

ok i will look, im not opening it tonight. may be a few days. i have been looking for the thread here you mentioned about. i have found a very good one about biasing. not found the one you speak of yet tho.

thanks i will pick some up and try to get this thing cleaned up.

OH BTW.....antenna is back up on the tower and SMOKIN..................the insane ground plane is back!