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hpr_transcripts/hpr4192.txt

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+Episode: 4192
+Title: HPR4192: Replacing backup batteries in my Kenwood HF Radio Part 2
+Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr4192/hpr4192.mp3
+Transcribed: 2025-10-25 21:05:01
+
+---
+
+This is Hacker Public Radio Episode 4192.
+For Tuesday the 27th of August 2024, today's show is entitled Replacing Back-Up Batteries
+in My Kenwood HF Radio Part 2.
+It is part of the series Ham Radio.
+It is hosted by Mr. X and is about 13 minutes long.
+It carries an explicit flag.
+The summary is Replacing Batteries in My HF Amateur Radio T.S. August 3, 2024.
+Here's Replacement of the Clock Battery.
+Hello and welcome Hacker Public Radio Audience.
+My name is Mr. X and welcome to this podcast.
+As usual, I'll let this up by thinking if you play HPR for making the service available
+to us all.
+HPR is a community-led podcast provided by the community for the community.
+That means you can contribute to.
+So why don't you pick up a microphone and record something and send it in.
+I'm sure that must be something you can think of to send in.
+If we all send in just one show a year, there will be more shows and we know what to do
+with.
+And they're always looking for shows.
+And they're also going to create the live effort to try and slamline the process.
+It's really quite easy to do.
+So why don't you have a go at it.
+So yeah, anyway, this episode is part 2, which was originally recorded.
+I think it was just before Christmas actually, 2023.
+And will I replace some batteries, some backup batteries in my Kenwood TS940 S, which
+is an 8HF amateur ideal set.
+And these backup batteries hold up the one that I've been replacing in this episode.
+It holds up the clock time.
+So this covers replacing the battery, the existing battery with a new battery.
+And the difficulty is long away.
+This shows up this one is a wee bit shorter than the previous one.
+So just sit back and enjoy.
+Okay, so here's a wee pro tip.
+I just thought about it.
+I got a replacement.
+I think I did.
+I just went on an EBN look for Kenwood TS940S back at battery.
+And discovered somebody who was selling them.
+I should admit that they were new.
+And for the original, that would be an 1986 vintage, or very abouts.
+I'm not sure what year's the radio was on over that year, anyway.
+I noticed that the invoice mentioned CR2032.
+It did mention the number of radios that were fitted.
+TS430, 440, 330, and 940, memory backup battery.
+And that says CR2032.
+Well, there's a standard CR2032s.
+I'm guessing that they're not original.
+Okay, Kenwood batteries, if they were to be jiggered by now.
+Probably 2032s.
+I'm CR2032s.
+It's a standard that batteries use for a number of things.
+They're used in air tags, for example.
+And whether these have been, they've put, there's like,
+two metal strips welded onto, to allow you to solder it onto the PCB.
+And there's yellow, heat shrink type round, round outside.
+I guess that's the topic.
+Shortening it against ending.
+Do look a bit.
+Just looking at the, do look a bit thinner than this substantial than the,
+the battery that was, indeed, just comparing with 2 just now.
+But still, I'm August hand, I don't leak actually.
+And I think, I did try to take a whole of, you know,
+Kenwood parts or whatever, Kenwood original parts,
+but I mean, it's, I think it's long gone.
+Okay.
+Interesting.
+Packaging is, it's a, kind of like a cellophane sort of sticky,
+to keep it in place.
+I haven't opened it incorrectly, I think that was my fault actually.
+Oh, that's interesting.
+So, these have been cut out of a pack by the look of it,
+with a piece of tape over the top to hold it in place.
+I'm not sure what all that means.
+But what I was thinking was I should have,
+I should have checked these batteries are, are okay.
+So, I've got my trusty Fluke 77 digital voltmeter here.
+And if I place it, it says plus.
+Obviously, the digital multipliers doesn't matter,
+the clarity, it'll compensate for that.
+I'll put them in the correct way.
+Just do that where I can check the clarity, the battery's correct.
+So, plus there.
+Minus there.
+3.35 volts DC.
+And I'll just check was it a positive voltage?
+Yes it was.
+And so, that is as per marked.
+So, I can get again a plus on the top,
+and put one contact on that, one contact on that.
+3.3, yeah, they're both the same, 3.3.
+And a plus is on the top.
+Then we'll just check, I assume the plus is on the top,
+on this one.
+No, no, no.
+Of course, maybe it's another plus is on the bottom.
+And the rest thing, plus is on the bottom.
+Hmm.
+Plus, it says on the bottom.
+Yeah, I guess I could put them in, put it on the other way round, I guess.
+It's maybe just a way it's mounted in the tray.
+Yeah, I'll take a photograph of the two batteries,
+so you can see that, just fun to seek.
+Right, I'm going to take the, I'm going to remove one of the batteries
+just to see, to confirm, actually I could hold it up against it first of all.
+Yeah, that might be a bit, a bit short actually.
+Hmm, that's not good.
+It looks to me like the whole pitch for the two contacts is too small.
+That's not good.
+That's not good at all.
+So the positive is on the bottom.
+Yeah, that's not going to a bloody fit.
+Oh, thank you.
+That's really handy.
+I guess I should have checked all of this before I took the leads to the bits.
+We'd have to extend that, I think.
+I wonder what, I just, I wonder what the battery voltage is.
+It's all a bit planning isn't it, and I haven't planned.
+It's all a bit planning.
+This is all going to have a bit of a laugh while I'm doing this.
+So, put my probes on there and there.
+Try again there and there.
+Yes, point two of old.
+I would say this battery is pretty ghost.
+Yes, point two of old as opposed to three point,
+whether it was three point three, was it something like that?
+I'll just have a check at this.
+Is there any other writing on the board?
+Not seeing anything.
+These posts look quite thick and I don't think it's a good idea to be a bit bending them.
+I think I'm going to have to put a small link, a small wire link or something across.
+I think that's how we'll do it.
+Use a small wire link.
+That's probably the best way to doing it.
+Now, I think I have a soldering tool or a solder sucker.
+One somewhere.
+I'm sure I do.
+I came across it recently.
+Now, of course, if I need it, I can no longer find it.
+I'm sure some people have got a beautifully stocked tool box with everything,
+all the individually separated and whatnot.
+Take it out.
+Oh, here we go.
+The soldering tool or solder sucker.
+I guess a bit of tumma soldering out on.
+Right.
+I've got some fresh solder here.
+I had some other solder somewhere around here, I'm sure.
+Because that one looks like a packet I haven't used before.
+I'm waiting in the soldering and heating up.
+Well, it takes very long.
+I could choose.
+I've just found a resistor with quite reasonable thickness of legs on it.
+I think I could perhaps use that to fashion an extender for the lead.
+Make a link.
+Yes.
+I'll see how that goes.
+So, I think what I'll do is I'll take this battery back.
+That's going to take longer than I expected.
+Place that there and safely out the way.
+Eye glass and our soldering tool.
+Soldered.
+Okay.
+Where's the end?
+Let's see if I can find another bit of solder.
+Okay, so that's me.
+I've managed to just solder the battery that goes on to the clock timer.
+I haven't done the one for the frequency PLL circuitry.
+It took a bit longer than I expected.
+I don't think I hadn't planned this properly.
+So there's less to plan things out.
+I don't have enough space to work on.
+Lighting was terrible.
+It was directly above me.
+Every time I leaned over the radio I was in my own shadow, so that didn't help.
+And then of course the battery was the wrong physical size.
+I had a joining link to increase the pitch of the holes so that we could attach to the two poles.
+I'll take a photograph.
+It's not my most brilliant job, my most types of job.
+I think also I used that.
+I don't know.
+I was having difficulty getting the solder to properly adhere to the post.
+It wasn't flown properly.
+I was going to die joints as well.
+So I don't know whether the terminal of the battery had a contamination or what it was.
+I'm not quite sure.
+And it happened to balance a torch above the top of the radio.
+He held in place with a screwdriver so that I could eliminate the battery.
+I think it would have been better doing this downstairs.
+I think whether it would have been more space.
+I have this recollection.
+I had the same conversation many years ago when I did another HPR show.
+And I was talking about the radio.
+Or got his figure recollection.
+But it all blends into one.
+Anyway, I think I may leave it at that.
+Obviously record the putting it all back together again.
+I do want to do the other battery though because I don't want that to fail either.
+I don't want to waste it leaks.
+But I've kind of run out of time today.
+So maybe for another day.
+Let's see.
+Okay, I think that's about it for this episode.
+If you want to contact me, I can be contacted at MrX
+at hpr at www.wglmail.com
+That's MRX ATHPR
+www.theatsymbolgooglemail.com
+So tune in next time for another exciting episode of
+Battery Replacement on a came with TS940S.
+Bye for now.
+You have been listening to Hacker Public Radio
+at Hacker Public Radio does work.
+Today's show was contributed by a HBR listener like yourself.
+If you ever thought of recording a podcast, you click on our
+contribute link to find out how easy it reads.
+Hosting for HBR has been kindly provided by
+an honesthost.com, the internet archive, and our sings.net.
+On the Sadois status, today's show is released on our
+Creative Commons Attribution 4.0 International License.