I used to have a Kenwood TS-430S but gave it away when I got my new Yaesu 991a. It was a good radio for the past 4 years. ALC is Automatic Limit Control which you set with your mic and the gain knob. Key the transmitter and watch meter and keep it out of the red with the mic gain. Cheers & 73 from W Rusty Lane K9POW in eastern Tennessee
@MartinFenelon7 ай бұрын
Love my TS-430S. Had to change the relays though, but the receiver is very good considering it's age.
@williamogilvie69095 ай бұрын
I have a TS430S that I started using last year, after putting up a trap dipole and modifying a heavy linear supply that was originally in a server rack. The TS430S worked well for awhile. I worked a couple of Japan stations and some East coast stations. Lately I noticed the reception drop down a lot after I transmit. I disagree with your statement that there are a lot of relays inside the TS430S. There are 14 relays on the transmit filter PCB. However they have nothing to do with receive sensitivity. I looked at the schematics for the RF Unit in this radio and between the antenna and the preselector circuits there is one relay, RL1. In the receive circuit, (RF Unit) the ten preselector circuits all have PIN diodes and not relays. If the radio exhibits dropouts, as you demonstrated, RL1 needs to be replaced. It is not easy to do since it is soldered in. The RF Unit is on the bottom of the radio. The relay PN in the TS430S Service Manual is (Fujitsu) FBR211A The relay in my radio is an OMRON G2E 187P-M Both are SPDT 6 pin 12 V coil relays, so there could be many other replacements. The contact heating method you describe as a temporary fix does not do anything. The DC path to ground from the antenna connector when the TS430S is in receive mode is through a PIN diode and a 47k ohm resistor in each preselected circuit. There is the danger of exceeding The current rating of the PIN diode by doing this procedure. The original and only relay on the RF Unit board had Gold plated contacts. Over time and due to static discharge, the contacts become pitted. You can't fix that. Watching your video it looks like there are still reception fluctuations as you go up in frequency.. Each time you cross into another frequency band, the radio switches to another preselector, and so RL1 toggles and the attenuation changes. My theory is it does that to protect the PIN diodes from any static coming from the antenna. You should get a lot of noise on the low bands and gradually less as you go up in frequency. If it jumps around, that is not atmospherics. Its your radio. There might be other reasons why the TS430S's receive sensitivity drops suddenly. I have ordered the OEM replacement for RL1 and will replace it ASAP. I hope that will fix the problem.
@tzm18435 ай бұрын
Kenwood recommends this fix. They put out a service bulletin. Get it! You are mistaken: It has relays for each bandpass filter. See the block diagram.
@williamogilvie69095 ай бұрын
@@tzm1843 Not the first time a company has dispensed bad advice. There are 10 receive filters on the RF Unit board of the TS430S. They are all switched in with PIN diodes. Very typical for this vintage of radio. If you looked at the schematic, (in the service nanual) you would see that. There is only 1 relay on that board. There are 14 relays on the transmit filter PCB. That might be what you were looking at. OK, I took another look at the block diagram and schematics in the TS430S Users Manual and now I understand what you are saying. On receive the signal from the antenna connector does go through these transmit low pass filters. However I still don't believe this procedure accomplishes anything. In this video I did not see any improvement. The L.P. filter relays are pretty rugged. If the receive contacts get scuffed up so easily, wouldn't the transmit contacts get scuffed up much worse? If your radio has transmit level problems on the same bands as it has desense, then I would say some relays on the L.P. Filter board might be the cause. I am dubious that the contacts can be fixed this way. My TS430S goes into a very noticeable desense right after I key up. The peak power is consistently 100 Watts on all bands. Only the receive side is being attenuated. Update: No problem on recieve with my TS430S. I am using an AT250 antenna tuner and was leaving the tune switch pressed. Rx was attenuated because of that.
@StillCloser3 жыл бұрын
So, what happened with the motorboater radio, you throw the towel ?
@624radicalham2 жыл бұрын
Love your channel Jim! I must say, after decades being into shortwave radio and repairing them, at 8:54 you say that you really don't know what Processor and ALC are in a radio? Your curiosity has never in decades been piqued to discover how an amateur radio works? I say this as someone who doesn't have 1/4 of your repair knowledge and yet since 1992 I found a love for HF radio and have learned every year since.
@truthreigns73 жыл бұрын
This brings back memories. I had the Kenwood TS-530 S.
@rick507811 ай бұрын
Has anyone tried creating and installing the contact maintenance circuit as described in the same service bulletin (SB-902), which is intended to mildly clean the contacts every time bands are switched? If so, what would you recommend to use instead of the now discontinued L33-0259-05 choke?
@kayakbassfishing4733 жыл бұрын
Hey I am buying a TS-430s Kenwood Radio would you please go over and fix anything wrong with it can you do that or is that too much to ask? Thank you.
@mrtechie68105 ай бұрын
Kindly advise: I extracted the output filter board of a TS-430S to work on it. Issues: 1. Intermittent low rx (probably "dirty" relays). It appears they are all sealed (except the tx/tx relay). I tried using a "wetting voltage" as described in a Kenwood service bulletin, but there is still intermittent loss of rx, especially on 10m. 2. One of the inductors (L41) is shorted. 3. How do you test a diac (D18)? (It reads short circuit in both directions.) Apparently it is for overload/surge protection. 4. The S meter reads extremely low. I failed to recalibrate S9 (even with the trim at maximum, it doesn't reach 9).
@kevins4736 Жыл бұрын
This hf radio is well over 30 years old. Replace the relays, there cheap enough. I’m not going to juice my antenna connector with 500 milliamperes. It cost me 15 dollars to replace all the relays
@rick5078 Жыл бұрын
I have been wanting to do this actually as I keep having the same problem reoccur every year or two where in many bands the volume goes away. Would you be able to tell me which relays to use to replace the original ones with?
@tzm18435 ай бұрын
@@rick5078 there is a workaround. See Kenwood TS-430S Service Bulletin SB-902.
@andrewverran34983 ай бұрын
How do you push amps , i thought amps were drawn by a device ? Cheers .
@kennynvake4hve5842 жыл бұрын
How many volts do you use.????
@JonAhlquist Жыл бұрын
13.8 V. Google: Kenwood TS-430S Service Bulletin SB-902.
@CSSLLC-hu4vn Жыл бұрын
@@JonAhlquist TNX Jon!
@cadiscase3 жыл бұрын
Crazy !
@AndrewBryantPianoTuner2 жыл бұрын
I thought you had to use a resister?
@boundlessfreedom83402 жыл бұрын
Nice, Milton Lords old trick
@tzm18435 ай бұрын
Looks like you only used 3 volts, not 13.8!
@StillCloser3 жыл бұрын
i've tried this with my PlayStation 5, all I got was smoke... Smoke and flames everywhere...!!!
@michaelblack50113 жыл бұрын
the sound of this video is bad quality like 32 kbps or 24 kbps