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Author Topic: FT 101E No receive  (Read 1140 times)
KC4ZFC
Member

Posts: 2




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« on: June 02, 2003, 09:35:24 PM »

Have an FT 101E that has little or no receive on all bands. Checked and cleaned boards. Checked fuse lamp, relays. Xmtr has full output.  Just no receive.  Any help/advice appreciated.
Thanks,
Steve
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KB0NLY
Member

Posts: 1




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« Reply #1 on: June 03, 2003, 03:19:29 AM »

Just a thought, have you checked for receive with the heater switch in the off position?  I know it sounds goofy, but i had a 101EE that had iffy finals that would go into oscillation and wipe out the receive.  Other than that, the only other things i can think of is to check and reseat the band crystals, on the right side just behind the front panel by the 12by7a driver tube.

If nothing is happening yet i would consider checking all the voltages as shown on the voltages chart.  Do you have that chart?  It might also be a component that failed completely.

73,

Scott, KB0NLY

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WB2WIK
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Posts: 20613




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« Reply #2 on: June 03, 2003, 03:14:56 PM »

When you say you "checked relays," how did you check them?  Did you use an Ohmmeter to measure continuity through the RX-side contacts?

Dirty relay contacts are the leading cause of RX sensitivity dropoff in these older rigs.  It may be something else of course, but I'd check that thoroughly, first.  This is also the cheapest thing to repair, since all it takes is a $1 bill slid through the contacts several times to clean them, and then you can still spend the dollar when you're done!

WB2WIK/6
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KC4ZFC
Member

Posts: 2




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« Reply #3 on: June 03, 2003, 04:39:44 PM »

Swapped relays with known working set. No help.. Still troubleshooting.. If and when I find the culprit I'll post it. Might help someone else. Thanks for input..
Steve
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KB0NLY
Member

Posts: 1




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« Reply #4 on: June 03, 2003, 05:07:54 PM »

Was the radio this way when you got it?  Or did this happen slowly or suddenly over time?

73,

Scott, KB0NLY

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VE7DMY
Member

Posts: 4




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« Reply #5 on: June 04, 2003, 03:17:02 PM »

Hi Steve,

Check the 3SK40 Dual Gate MOSFET (Q2) on PB-1181 RF Unit. I have had 2 101s where this FET was dead.

Regards,
Dennis
VE7DMY
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WA4PTZ
Member

Posts: 528




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« Reply #6 on: June 07, 2003, 09:10:15 AM »

I'd say VE7DMY has the answer....sounds like the
FT-101 was a near miss lightning strike, or a
serious static discharge victim. The 101 has such a
good RX that it will pick up stuff with no antenna.
So, if you tried a RF signal generator nearby, it
would pick up a signal. If not....back to the mosfet.

73 - Tim
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WA4PTZ
Member

Posts: 528




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« Reply #7 on: June 07, 2003, 09:10:16 AM »

I'd say VE7DMY has the answer....sounds like the
FT-101 was a near miss lightning strike, or a
serious static discharge victim. The 101 has such a
good RX that it will pick up stuff with no antenna.
So, if you tried a RF signal generator nearby, it
would pick up a signal. If not....back to the mosfet.

73 - Tim
Logged
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