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Author Topic: MY DX100...NOW WHAT!  (Read 3778 times)
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ve6pg
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« on: January 25, 2009, 03:28:36 PM »
..ok..this dx100 has been a real pain...removed all the mods fer ssb exciter, etc...new rectifier sockets...new hv caps...new lv caps...it runs fer about 6 months, then gets sick...latest is, i noticed the odd time the audio would scream..the meter would peg, then settle down...today, the audio started the same thing...i checked all the tubes..all ok...put rig in cw mode, threw the plate switch, and the plate current meter pegged off the end...swr was good...back to am, thru the switch  again, and a light show in the 1625s...back to cw, thru the plate switch, meter pegs, 5r4s start zorching, and the 1625s...poof...fuse blew...

..ideas?..

..sk..
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...Yes, my name is Tim Smith...sk..
Jim KF2SY
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« Reply #1 on: January 25, 2009, 05:39:56 PM »
Hmmmm...
Pull out the modulator tubes.
Get yer meter out.  Check HV
Make sure you got 750.  If not 5R4 toast and/or those filter caps (R34) were'nt up to the task.
It was working for sixth months as a daily radio?  HV supply does not seem happy, its a start there.
G/L
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ve6pg
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« Reply #2 on: January 25, 2009, 06:06:56 PM »
...mod toobs were pulled, at one point...same deal...meter was pegged...caps were replaced about 3 months ago...with line voltage higher these days, hv was closer to 800vdc...

..sk..
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...Yes, my name is Tim Smith...sk..
ve6pg
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« Reply #3 on: January 26, 2009, 10:48:32 PM »
...looks like the drive pot is pooched..either off, or full blast...replacement time..

..sk..
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...Yes, my name is Tim Smith...sk..
Todd, KA1KAQ
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« Reply #4 on: January 27, 2009, 12:50:31 PM »
There ya go, Tim. Stay with it, there's only so many places for the gremlins to hide in that box. Wink
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known as The Voice of Vermont in a previous life
flintstone mop
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« Reply #5 on: January 29, 2009, 04:14:05 PM »
You gotta keep the light shows to a minimum, Tim........

They may be stresing other components or the power transformer.

Fred
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Fred KC4MOP
ve6pg
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« Reply #6 on: January 29, 2009, 04:53:41 PM »
...fred...what is more stressed, is me...

..this thing was cornverted to ssb, with a outboard ssb generator, of some kind...so, i have had to remove alot of the mods...things run great fer about 4 months, then something else gives up the ghost...this thing has more time on it, than a washington street walker...

..sk..
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...Yes, my name is Tim Smith...sk..
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Patrick J. / KD5OEI
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« Reply #7 on: January 29, 2009, 05:01:19 PM »
west coast or DC?
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Radio Candelstein
ve6pg
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« Reply #8 on: January 29, 2009, 05:29:40 PM »
...DC...i dont think there are any streets in washington state, just trees, and mountains...

..sk..
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...Yes, my name is Tim Smith...sk..
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