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Author Topic: Hammarlund HQ-140X  (Read 4682 times)
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W9BHI
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« on: June 21, 2012, 08:09:11 PM »
Has anyone ever seen one of the 2 pin plugs that go into the "relay "socket on the back of the old Hammarlund receivers?
It has 2 round pins.
I have done extensive searching on the internet and have come up with nothing at all.
If someone has one and would like to part with it, I would be more than happy to purchase it.
Thanks,
Don W9BHI
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KM1H
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« Reply #1 on: June 21, 2012, 09:42:39 PM »
Old tube pins

Carl
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W7TFO
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« Reply #2 on: June 21, 2012, 10:42:05 PM »
Headphone cord tips pushed into tight holes in a small block of plastic or an old fader knob.

73DG
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Pete, WA2CWA
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« Reply #3 on: June 21, 2012, 11:03:10 PM »
A picture would be helpful or the diameter of the pin holes and the center-to-center distance of the holes. Junk boxes are probably loaded with all kinds of 2, 3, 4, 5, etc. type plugs that we have no idea where they might be used or probably even where we got them. Unfortunately, the manuals for the HQ-140X and 140XA do not show a rear view shot of the chassis.
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Pete, WA2CWA - "A Cluttered Desk is a Sign of Genius"
W9BHI
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« Reply #4 on: June 22, 2012, 10:48:11 AM »
I am using one inch long peices of copper house wire which is around .080 in diameter to go into the sockets.
The spacing of the pin centers is about 5/16.
This is what I got with my dial calipers.

Here is a picture.

* 001.JPG (1552.42 KB, 2816x2112 - viewed 448 times.)
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KM1H
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« Reply #5 on: June 22, 2012, 11:35:19 AM »
My digital calipers come up with .122" which is the same as any self respecting 807 or any other 5, 6 or 7 pin tube using the same pins....some use 2 larger pins for the filaments.

As far as a manufactured mating plug I cant remember ever seeing any and it would seem to be hard to remove if just a flat phenolic board.

Carl
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ke7trp
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« Reply #6 on: June 22, 2012, 11:47:32 AM »
I made my plug out of an old Xtal holder that was cracked for one radio. I also made some using the wire on some old 2 watt carbon comp resistors. The wire fit tight, so I soldered them on with heat shrink covers, then used a Zip tie to provide some tension towards center.  Safe and free.

C
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ve3cmm
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« Reply #7 on: September 14, 2012, 11:38:54 PM »
Can someone explain how this "relay" connection works?  Is this how the receiver is muted?  How does that work?
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W7TFO
WTF-OVER in 7 land Dennis
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« Reply #8 on: September 14, 2012, 11:53:26 PM »
Leave the radio in the 'transmit' position.

Connect a single pair of normally closed contacts in your T/R relay system to the 'relay' socket on the radio.

It will now follow your PTT commands.  Sequence to taste.

IOW, you will need an external relay to make it work.

73DG
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