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Author Topic: swan 350  (Read 284 times)
KD0GCH
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Posts: 3




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« on: September 06, 2009, 09:04:36 AM »

i just got my swan 350 and i found a lot of final tubes for it so i put in a matched pair and now the radio is clicking in the rx stage but tx is is fine. the click seems to go faster as it warms up. can anyone help?
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W5GNB
Member

Posts: 419




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« Reply #1 on: September 06, 2009, 06:14:41 PM »

I would check for something arcing in the high voltage.  The Swan has HV on the plates at all times when it is on.  It also uses the pi network in the final as a pre-filter for the receiver.

73's
Gary - W5GNB
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W5RRP
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Posts: 12




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« Reply #2 on: September 06, 2009, 06:45:20 PM »

I think the 350 has 2 relays involved in xmit & rcv transition.  I fixed one in a 500C by simply tapping on it, and one on a 350A by taking it apart and cleaning it.

Good Luck,
Ron
W5RRP
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KD0GCH
Member

Posts: 3




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« Reply #3 on: September 28, 2009, 09:31:57 AM »

Well last night i was tuning up on 10m and a puff of
smoke came out of the radio.My SWR was 1:1-1:2 on 28.400
MHz. i tryed putting in new tubes but still only 5-7 watts out.
What i need to know is is this radio worth fixing? I mean i looks great what should i do? Will KD0GCH.
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WA3SKN
Member

Posts: 5559




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« Reply #4 on: September 28, 2009, 10:43:31 AM »

Worth fixing???
Sending out to a repair shop... No!
Finding a local Elmer at the club that is willing to take a look... Yes, worth doing. With a tube set, you first check the tubes, then start checking the capacitors.
But this could justify getting that new rig, though!
73s.

-Mike.
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