Guys, Thank you for your responses. Why I was asking for a picture is because I was looking for one (MC-47) and couldn't find one. The reason I wanted one was that I had the regular hand mic, MC-43, but that one does not have the 4 buttons on the front. The MC-47 does which on the TS-50 or 60 can do other menu functions on the fly. You can set each of these buttons to operate a menu function of your choice.
So I found several MC-44's on ebay for around $15. That model had the 4 buttons on it. I looked?at the schematics of both the MC-47 and MC-44 and the up down, and 4 buttons operated the same and the schematics for both were the same. There was one difference though, the 44 had a condenser mic and the regular 43 had a dynamic mic.
So I was thinking if I got?a?44 I could install a dynamic mic element from a 43 mic into it if the swap would physically fit. The TS-50 does not supply the voltage for the condenser mic element where the element from the 43 needs no voltage to work. This is why I was hoping someone had an inside picture.
I have since found a 47 from a friend. That mic had a problem but it turned out only to be a bad ground wire on it so it's now working and I have my 47!
I use the 4 buttons on the front for ... 1. power out, 2. cw filter in or out,? 3. cw reverse, 4. AGC fast or slow. This avoids you having to go to the menu to change these settings while operating. Extremely handy.
Now a 47 did pop up on ebay after I did all of this but I'm just a retired social security guy and can't buy everything. I wish I could buy that one to have a spare. If it's still on ebay in a couple weeks I'll try to get it.
Long story I know. 73, Bob W4JFA
I see. You know there is at least one MC-47 available on ebay, and MC-43 microphones (non-OEM) are available for approx $20USD on ebay and Amazon and I believe will work with a TS-50.
?
On ebay you can search for OEM MC-43S microphone, and find something reasonably priced.
?
If you can find a direct replacement for the element, it's possible it would be more expensive than purchasing a non-OEM microphone.
Good luck,
W7STF Sam
|
I see. You know there is at least one MC-47 available on ebay, and MC-43 microphones (non-OEM) are available for approx $20USD on ebay and Amazon and I believe will work with a TS-50.
?
On ebay you can search for OEM MC-43S microphone, and find something reasonably priced.
?
If you can find a direct replacement for the element, it's possible it would be more expensive than purchasing a non-OEM microphone.
Good luck,
W7STF Sam
|
I have a schematic but wanted pics so I could see what the element looked like along with its physical size etc. Thanks, Bob W4JFA?
Bob,
Picture, or schematic?
?
The schematic can be found here:
W7STF Sam
|
Bob,
Picture, or schematic?
?
The schematic can be found here:
W7STF Sam
|
Good Day,
Does anyone have any pictures of the inside of an MC-47 mic? The factory?original mic for the TS-50.
Thank you.
Bob W4JFA
|
Re: TS-450S BCB sensitivity
?
This is not a comprehensive response to your query
but I hope it suffices for now.
?
The channel number is really just a frequency that
is the KW standard for alignment. The Menu number is something
else.
?
To my understanding, there are two procedures that
create a digital curve that is stored in ROM. One of these is the S Meter curve
and the other is the ALC curve.
?
If you perform RX alignment of any consequence, you
must perform the S-Meter curve procedure, and the same can be said for TX
adjustments and the ALC curve. Neither of these procedures are particularly
intuitive, so I would suggest going through them a few times for
familiarity.
?
Please note that these "curves" require that you
perform the #17 EEPROM write as described on page 43 of the SM when you finish
the procedure.
?
I hope this helps....73...Jordan VE6ZT
----- Original Message -----
Sent: Friday, April 11, 2025 1:57
PM
Subject: Re: [Kenwood-Amateur-Radio]
TS-450S BCB sensitivity
Jordan,
?
As much as you can share on your findings and solutions would be much
appreciated.? I understand the idea but haven't understood how to use the
adjustment mode relative to the Adjustment tables.
Mike
|
Re: TS-450S BCB sensitivity
Jordan,
?
As much as you can share on your findings and solutions would be much appreciated.? I understand the idea but haven't understood how to use the adjustment mode relative to the Adjustment tables.
Mike
|
Re: TS-450S BCB sensitivity
?
Hi group...
?
I'm not finished working on my 450S, but i've got
to say that the 450 and 850 service manuals contain some very poorly written
translations from Japanese, and also some errors in the alignment instructions
that take some time to decipher and adapt to the correct alignment
methods...
?
More later....73...Jordan VE6ZT
----- Original Message -----
Sent: Sunday, March 23, 2025 2:49
PM
Subject: Re: [Kenwood-Amateur-Radio]
TS-450S BCB sensitivity
Group...
?
If there is someone with a TS-450S who can check
the change in sensitivity crossing the 499 to 501khz and 1704.00 to 1706.00khz
points (where the BCB attenuator is switched in and out) I would really
appreciate it...Even better if you have a signal generator and can tell me the
S-Meter changes at those frequencies...
?
I'm trying to limit the number of times I have to
pull the RF board because of the stresses and strains?on the board,
connectors and thru-holes...
?
Thanks...Jordan VE6ZT
----- Original Message -----
Sent: Saturday, March 22, 2025 3:35
PM
Subject: Re: [Kenwood-Amateur-Radio]
TS-450S BCB sensitivity
I've made a few "discoveries" about the root of
the BCB?problems I have?been having. Should I post my findings
here or on the 850S page...?
?
73...Jordan VE6ZT
----- Original Message -----
Sent: Friday, March 14, 2025 4:37
PM
Subject: Re: [Kenwood-Amateur-Radio]
TS-450S BCB sensitivity
Well, I replaced the diodes and it didn't
make any difference...Time to make some
dinner...73...Jordan...
----- Original Message -----
Sent: Friday, March 14, 2025 2:27
PM
Subject: Re:
[Kenwood-Amateur-Radio] TS-450S BCB sensitivity
Ooops...it should read "...which formed
part of the BCB attenuator..."
?
73...Jordan...
----- Original Message -----
Sent: Friday, March 14, 2025 2:23
PM
Subject: [Kenwood-Amateur-Radio]
TS-450S BCB sensitivity
Hi group..
?
I have a 450S which has served me very
well for ~30 years now. Long ago, I jumpered the resistors which
formed part of the BCB, effectively removing the attenuator. It was
fine for years like that, but a few months back I noticed a drop in
BCB sensitivity.
?
All other bands are fine...
?
I checked everything I could, replaced
the jumpers and verified the ckt, to no avail.
I checked the control line for
that?band at the 74LS245 and found what I thought was the
problem, so this morning I replaced that IC.
?
It didn't solve the problem. The only
other thing I can think of is that one of the 2 RLS135 diodes for that
band might be flaky so I checked them as diodes and they test
fine.
?
Is it possible that these diodes might
operate fine for DC but not for RF...?
?
I think I'll replace those two diodes and
check again, but this has me a little stumped...
?
73...Jordan
VE6ZT
|
Hi all, I have a TS-50 that has all the foam that holds the front buttons in place deteriorated beyond use. I'll figure out something here but I was curious if anyone has already been through this and has any hints.
Thanks in advance.
Bob W4JFA
|
Re: SM-220 two tone adjustment
OK scrub that. I ve just found the pot adjustment screws underneath the bottom cover ... ?.
?
--
Mike G8GYW
|
SM-220 two tone adjustment
I'm checking the performance of my newly acquired SM-220 and note that the levels of the two tone generator measured at TP1 and TP2 are 5.8V p-p which is nearly double the specified 3V.
?
So I decided to adjust them but found this to be impossible because VR108 is inaccessible (under the CRT) and I can't see VR107 anywhere. My PCB doesn't match the drawing in the service manual.
?
Any ideas please?
?
--
Mike G8GYW
|
Re: Kenwood SM-230 Station Monitor
Thanks Tom.
?
--
Mike G8GYW
|
Re: Kenwood SM-230 Station Monitor
I leave my 220 in line all the time, and turn it on for the first few transmissions from each transmitter so I can see what my signal looks like. (I'm one of those idiots who constantly tinkers with their audio train. Sometimes unexpected things happen...) ? ?I leave it off otherwise to save the CRT. ?Insertion loss is negligible as measured by VNA or watt meter (located just before the antenna).
?
73,
Tom ai4th
|
Re: TS-870S rear panel audio input
I believe the speech processor is only available for the microphone main connector circuit.
|
Re: TS-870S rear panel audio input
Thanks Sam that link was very informative and it has persuaded me not to go down that route. I don't need the complication of an audio rack!
?
--
Mike G8GYW
|
Re: Kenwood SM-230 Station Monitor
I couldn't find an SM-230 locally but I did get an immaculate SM-220. Not the same colour as my radio but it will do for now.
?
Do you guys leave the monitor in the antenna lead all the time or just connect it up when needed? Is the VSWR / insertion loss OK?
?
--
Mike G8GYW
?
|
Re: TS-870S rear panel audio input
I think the main difference between the two input methods is that the mic input has a differential amplifier to cancel common-mode noise (i.e. noise imposed on both the signal and ground wires from the microphone) where that isn't the case with the ACC connector input.?
?
Here is more discussion on the same site provided by Trevor
?
Sam, W7STF
|
|
|
Re: TS-870S rear panel audio input
Thanks Trevor. I get the impression that the guys doing this are running external audio processing whereas I would just want to use the mic (at an appropriate level).
?
--
Mike G8GYW
|
Re: TS-870S rear panel audio input
Hi Mike
You might like to look at this;
?
?
I have to say I’ve not yet tried using the ACC in place of the mic…
?
73
trevor G4CLE?
|
Bob
Tom ai4th
Trevor Baker