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Title: Hammarlund HQ-140X Post by: W9BHI 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 Title: Re: Hammarlund HQ-140X Post by: KM1H on June 21, 2012, 09:42:39 PM Old tube pins
Carl Title: Re: Hammarlund HQ-140X Post by: W7TFO 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 Title: Re: Hammarlund HQ-140X Post by: Pete, WA2CWA 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.
Title: Re: Hammarlund HQ-140X Post by: W9BHI 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. Title: Re: Hammarlund HQ-140X Post by: KM1H 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 Title: Re: Hammarlund HQ-140X Post by: ke7trp 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 Title: Re: Hammarlund HQ-140X Post by: ve3cmm 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?
Title: Re: Hammarlund HQ-140X Post by: W7TFO on September 14, 2012, 11:53:26 PM Leave the radio in the 'transmit' position. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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 |