How loud are the switching relays with Flex radios?

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  • Updated 3 weeks ago
I am planning to get back on HF after being inactive for decades. I'm planning on buying a new HF radio in the future. I used to like to use CW full break-in and AMTOR. I understand AMTOR is not popular anymore. My Kenwood TS-940 relays were pretty quiet, but some radios, the relays are very loud, and listening to a lot of loud clanging relays would be very annoying. How quiet are the switching relays with the Flex radios?
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Dave, KY0L

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Posted 3 weeks ago

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The Relays in the Flex6700 and 6600M are pretty quite,  if you have a built in tuner like the stock 6700 and 6600 then the tuner relays while they are tuning are a little louder mainly because there are several of them going at the same time while tuning but for normal operation there is only the small signal TX/RX relay.  

Actually my Heil trigger and foot switch PTT switch's makes more noise then the TX/RX relay.

If you want a very very quite shack then you can place the radio in another room and run it with a Maestro,  IPAD or computer and you have NO relay noise.

I think you will be VERY pleased with it in your shack running CW and the Digital modes with NO interface wires.

73's and Merry Christmas
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Dave, KY0L

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Thanks for your answer about the relay noise levels! It will be nice to have an environment free of loud clanging relays!
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Burt Fisher

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I hate fans and relay noise. I have a 6400M. Very quiet.
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Craig - KØCF

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I use a 6500 and operate QSK CW all the time.  This radio is as near to perfect for that as any I have ever used. I use speakers rather than headphones most of the time and never notice the relays in the 6500.  I use it with an Elecraft KPA-1500 which is totally silent on QSK.
Craig, KØCF

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Dave, KY0L

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Thanks for your answer about the relay noise! I would like to have pretty quiet relays during CW full break-in, and for any digital modes that have handshaking. I loved AMTOR when it was popular, but some rigs that ran AMTOR created horrible loud relay clanking noises because AMTOR pulsed the transmitter about every second or two seconds.

I used to use the Commodore 64 and an AEA CP-1 interface for the digital modes. Now, I'm going to have to learn what I need for the digital modes, including CW. I loved to type ahead, sending CW, and having absolutely perfect CW sent by the HF radio. My Commodore 64 died many years ago, now I have a MacBook Pro computer.

Dave, KY0L
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John Culliton

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I'm sure you will enjoy the upgrade.
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Steve - G8KNC

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If you want to upgrade, someone near me is selling a Commodore 128 for 220 GBP, or about $278!