I'm working on restoring 2 HT220 slimline radios. I need the antenna adapter for my service monitor. Although I can jury rig something, does anyone maybe have an
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HT220 Tune-up kit
- Thread starter TheLeaper
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ElroyJetson
Getting tired of all the stupidity.
I remember that gadget. The one that temporarily screws to the back of the radio in place of the antenna launcher?
Haven't seen one in years but there's another big hamfest and swap meet coming up in my neck of the woods next month and I'll keep my eyes peeled. Don't expect anything but miracles do happen.
Haven't seen one in years but there's another big hamfest and swap meet coming up in my neck of the woods next month and I'll keep my eyes peeled. Don't expect anything but miracles do happen.
petnrdx
Member
Its not really a cable.
It is called a "cable" in some docs, and a "kit" and an "adapter" in others.
The adapter name is the best description.
It essentially is a balun or antenna impedance adapter.
You need two things, one can be made from cutting the top off of an old expansion "frame" so that you can work on the radio
with all the boards "unfolded".
The more difficult one to find is part number 1V80793A93.
It consists of a small aluminum box containing the impedance adapter circuit.
It has a BNC elbow on one end and a "plug" that inserts into the antenna hole in the radio.
There is also a metal tab that contacts the side of the metal frame.
I suppose you could improvise a replacement, but who knows what the impedance is supposed to be?
It is called a "cable" in some docs, and a "kit" and an "adapter" in others.
The adapter name is the best description.
It essentially is a balun or antenna impedance adapter.
You need two things, one can be made from cutting the top off of an old expansion "frame" so that you can work on the radio
with all the boards "unfolded".
The more difficult one to find is part number 1V80793A93.
It consists of a small aluminum box containing the impedance adapter circuit.
It has a BNC elbow on one end and a "plug" that inserts into the antenna hole in the radio.
There is also a metal tab that contacts the side of the metal frame.
I suppose you could improvise a replacement, but who knows what the impedance is supposed to be?
petnrdx
Member
Lets see if I can post a photo of these suckers.
Maybe someone has one of these and has no idea what it is.
Maybe someone has one of these and has no idea what it is.
N4LBLB
Newbie
I have one of these.
ElroyJetson
Getting tired of all the stupidity.
I've seen a version that actually required you to remove at least the back cover and spacer frame on non-slimline (omni) models, that screwed on in place of it, which was for bench service only. Got no idea what its part number would be and it must have been around the mid-late 80s when I saw it.
I remember a fair amount about HT220s. General stuff. Like 5 watt 4 channel Omni models that put out over 10 watts on the wattmeter, if the battery contacts were up to it. All kinds of crazy SP models that I should have bought at hamfests when they were dirt cheap, like the Coronary Observation Radios with their data connections to connect to the heart monitor. And the SP versions that were remote mic only, the front cover had no speaker or mic or even a grille. HT220s with SCAN. They did all kinds of crazy things. By rights there should be a museum of SP model HT220s. There sure were enough of them.
I remember a fair amount about HT220s. General stuff. Like 5 watt 4 channel Omni models that put out over 10 watts on the wattmeter, if the battery contacts were up to it. All kinds of crazy SP models that I should have bought at hamfests when they were dirt cheap, like the Coronary Observation Radios with their data connections to connect to the heart monitor. And the SP versions that were remote mic only, the front cover had no speaker or mic or even a grille. HT220s with SCAN. They did all kinds of crazy things. By rights there should be a museum of SP model HT220s. There sure were enough of them.
y85csm
Electron Wrangler
![20231001_201337[1].jpg](http://forums.radioreference.com/data/attachments/124/124511-7ccad6460b58db7924cfc3e2f2b3c830.jpg "20231001_201337[1].jpg")
![20231001_201337[1].jpg](/data/attachments/124/124510-7ccad6460b58db7924cfc3e2f2b3c830.jpg)
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