New life for your vintage portable radios

Hello here is an idea about how you can substitute expensive type-C batts in a ICOM IC-202S and / or resurrect some of your 1980’s radios.

Here is the idea:
Using four liitokala 26700 4000 mAmp liFe batts and 3 type C dummy batts in the center row doing the bridge. They work and they fit in place (very very tight…) but they fit.

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I took the idea of other colleague that made this:

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But I didnt want to use solded wires… and try the dummy batts. Worked!!

Hope this simple idea is usefull to other colleagues. It can also be used in other radios using 9 type-C batts.

(This mod needs a small drop of solder in the possitive tip of the liitokala batts, to improve conduction because they possitive poles are too flat )

Simple and easy, isnt it?

Its the “CT2IQK mod” , without mods…hi hi.

73 de CT2IQK Jorge

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If someone knows where is possible to find any source for an IC-202s mini iEC plug power cable and/or for the ICOM 36-3 and the ICOM 36-4 Xtals (144.400-600 and 144.600-800 Mhz segments) would be very pleased.

TNX Jorge

What are the actual crystal frequencies, Jorge?

My radio has installed the 36-1 (144.000-144.200 Mhz) and the 36-2 (144.200 - 144.400 Mhz) as you can see in the foto. I would like to find the third 14893.28 (144.400 - 144.600) and fourth 14915.50 (144.600-144.800) HC-25/U Xtals. But are very difficult to discover.

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The crystal frequencies are given in the manual, typically they are in the 14.8MHz range. They get multiplied by 9 and the 10.7MHz IF is added in.

My 202 is a tadge poorly right now, it goes into TX but there’s no output power. Just another job to look at.

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I made a 3-cell Li-Ion pack (3 x 18650) for my old FT208R, a small wooden block keeps it pressed against the contacts.
Max voltage is 12.6V when fully charged, which is the same as for a 9 cell Ni-Cad pack when fully charged (9 x 1.4V).

The rig is functional, but at 700g, and only doing 2m FM @2.5W … a bit heavy to drag along on a SOTA summit.

73,
Luc ON7DQ

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Jorge,

I suppose you want to keep your rig in its’ original state?

Otherwise it would be simple to make a replacement oscillator for the XTALS, with just an Arduino Nano and a Si5351 module. I’ve done it to modify a Drake RR-1 maritime receiver (see RigPix Database - Drake - RR-1) which needed ONE XTAL for every 500 kHz of frequency span.
With my oscillator it now covers all bands 0-30 MHz.
Generating separate TX and RX frequencies is also not so difficult.

73,
Luc ON7DQ

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Actually I would prefer to keep it original. But maybe one day in the future… who knows..

TNX for the idea.

Try to clean the relays and see what happens. I saw recently a post of someone doing that and his IC-202 came again suddenly to life.

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Personally I think it looks brilliant! I went down a Yaesu HT rabbit hole there and discovered the amazing looking FT-202.

Look at that meter it has on the top! Straight from an FT-290R! If it was all mode it would be like an HT edition of the 290.

Check out the great advert art too. The BMW, the city gent on his way to the country club in his C&A diamond patterned jumper, a dab of Steve Davis Pot Black or Yardley Gold to boot. Armed with a Showaddywaddy 8 track and a Yaesu FT-202R in one hand and a box of Terry’s All Gold in the other, washed down with a sniffter of Croft Original. Perfect!

The FT-207, 208 and 209 all look fantastic too. I like!

…and here, your Yaesu FT-208 even has a picture of a mountain on it! So why are you not doing what the manual says and putting it in your bag? :grin:

Oh, and I think you should get the NC-7 add-on as well to put in your bag. Just for completeness!

EDIT: I just noticed the city gent appears to have traded in his BMW for a Datsun. I wonder if he got liquidated going long on pork bellies and frozen concentrated orange juice? He looks a bit more anxious as well, as if he’s caught between being told some bad news and trying to listen to the football scores on BBC World Service shortwave. His XYL seems to have moved on as well… :thinking:

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The IC-202 doesn’t have a relay.

73, Peter - HB9PJT

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