Re: Kenwood SM-230 Station Monitor
Right. It may not bypass it, as I do see faint activity on the scope, but the signal emitted from the IF out is definitely weaker.
73,
?
David, WU3J
|
Re: Kenwood SM-230 Station Monitor
I know. I paid about $600 US for one in working order still with original box. I have been looking for one for about 5 years.
73,
?
David, WU3J
|
?
Hi Mike...
?
That's possible, I use the 13 Pin connector that
came with my Kenwoods and wired the connections myself...73...Jordan
VE6ZT
----- Original Message -----
Sent: Monday, March 24, 2025 4:32
AM
Subject: Re: [Kenwood-Amateur-Radio]
TS-870S no TX
On Fri, Mar 14, 2025 at 03:40 PM, Jordan wrote:
I've never seen a
sticker covering any of the rear panel connections in any Kenwood I've seen,
but I haven't owned or worked on an 870. Lots of 850s and 450s, but no
870s...It sounds more like an ACC2 connction problem than a rig
problem...
?
73...Jordan
Hi Jordan, it just occurred to me that maybe the dealer had identified a
fault with the ACC2 socket and put the sticker on to indicate it shouldn't be
used!
?
I've ordered another 13 pin DIN cable from a different supplier to see if
the poor fitting is due to the plug or the socket. I'm guessing the Kenwood
socket is pretty much unobtanium ...
?
--
Mike G8GYW
|
On Fri, Mar 14, 2025 at 03:40 PM, Jordan wrote:
I've never seen a sticker covering any of the rear panel connections in any Kenwood I've seen, but I haven't owned or worked on an 870. Lots of 850s and 450s, but no 870s...It sounds more like an ACC2 connction problem than a rig problem...
?
73...Jordan
Hi Jordan, it just occurred to me that maybe the dealer had identified a fault with the ACC2 socket and put the sticker on to indicate it shouldn't be used!
?
I've ordered another 13 pin DIN cable from a different supplier to see if the poor fitting is due to the plug or the socket. I'm guessing the Kenwood socket is pretty much unobtanium ...
?
--
Mike G8GYW
|
Re: Kenwood SM-230 Station Monitor
I have a TS-870 with matching PSU and loudspeaker, all in immaculate condition.
?
I'd love to get my hands on an SM-230 to complete the lineup but they are like hens' teeth here in the UK.
?
--
Mike G8GYW
|
Re: Kenwood SM-230 Station Monitor
It was too long ago for me to remember. I don't think it bypasses 8.83 since I use AIP and the 8.83 CW filters at times. Bob W4JFA?
I noticed that the band scope display is non functional when the 850 has the Advanced Intercept Point (AIP) enabled. I assume this bypasses the 8.83 MHz IF. Anyone care to have discussion on this?
73,
?
David, WU3J
|
Re: Kenwood SM-230 Station Monitor
I noticed that the band scope display is non functional when the 850 has the Advanced Intercept Point (AIP) enabled. I assume this bypasses the 8.83 MHz IF. Anyone care to have discussion on this?
73,
?
David, WU3J
|
Re: Kenwood SM-230 Station Monitor
I like my 850 too. While I have an Icom IC-7610 (I like the TS-890 too)and appreciate the benefits of SDR and the waterfall display, sometimes I just want to sit down at a radio and have everything accessible from a dedicated knob or button. For example, RF output it a simple knob on the 850, while on the Icom, it is a menu press and use of a multi function knob. This is important as when using the 3CX800A7 based amplifier like the Alpha 87A, RF power needs to be regulated at between 45-55 watts for each band to go full legal.
73,
?
David, WU3J
|
Re: 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
|
Re: TS-450S BCB sensitivity
Hi David...
?
I'm not finished my investigation...I'll need
another day or three...73...Jordan VE6ZT
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Sunday, March 23, 2025 6:09
AM
Subject: Re: [Kenwood-Amateur-Radio]
TS-450S BCB sensitivity
Jordan,
I'd place your findings here. What did you find?
|
Re: TS-450S BCB sensitivity
Jordan,
I'd place your findings here. What did you find?
|
Re: Kenwood SM-230 Station Monitor
David, A good friend had the 850 and sold it to me when the 870 came out. I've had it ever since. I love the 850. I do have the digital recording unit in it which I had recently replaced the back up battery in. I also have three CW filters & the voice module to announce the frequency.
There's only one thing I wish it had is adjustable cw side tone from the front panel. I know there's a mod for that however it only adjusts the audio from it's internal setting and lower. With headphones the audio level is fine.? Regardless of the AF, the side tone is always at the same level. Some designer missed the boat on that one.
Bob W4JFA?
Thanks Tom.
?
?I just verified that the Band scope function is working as well. I am enjoying dimming the lights and tuning around the band as well as using the other SM-230 functions. It makes a nice light show. While I respect the latest SDR radios and have one from one of the big three (Kenwood/Icom/Yaesu), I still enjoy the TS-850 which is the pinnacle of solid state and the PL / cystal controlL.
?
I bought the TS-850 new in 1992, but am enjoying buying all the filters for it that I could never afford then new, but snatched up on EBay.
?
In my TS-850S I have:
DRU-2 digital recorder
Filters fo2 8.83 mhz, 1.8khz, 270 hz
Filters for 455, 500 hz
AT850 Antenna tuner
?
I am using a HAMPlus AS-61WL to interface up to 3 radios to 6 antennas as well as an amplifier and tuner seamlessly. I am planning on adding the RigSelect Pro Transceiver Switch to handle switching my Heil headset among the 3 radios. Both radios are interfaced to my logging software so I can switch between rigs during a contest depending on mood. Eventually, I want to add an older tube type radio (ex: Collins, Drake, etc) to the array so I can have fun across all eras.
73,
?
David, WU3J
?
|
Re: Kenwood SM-230 Station Monitor
Thanks Tom.
?
?I just verified that the Band scope function is working as well. I am enjoying dimming the lights and tuning around the band as well as using the other SM-230 functions. It makes a nice light show. While I respect the latest SDR radios and have one from one of the big three (Kenwood/Icom/Yaesu), I still enjoy the TS-850 which is the pinnacle of solid state and the PL / cystal controlL.
?
I bought the TS-850 new in 1992, but am enjoying buying all the filters for it that I could never afford then new, but snatched up on EBay.
?
In my TS-850S I have:
DRU-2 digital recorder
Filters fo2 8.83 mhz, 1.8khz, 270 hz
Filters for 455, 500 hz
AT850 Antenna tuner
?
I am using a HAMPlus AS-61WL to interface up to 3 radios to 6 antennas as well as an amplifier and tuner seamlessly. I am planning on adding the RigSelect Pro Transceiver Switch to handle switching my Heil headset among the 3 radios. Both radios are interfaced to my logging software so I can switch between rigs during a contest depending on mood. Eventually, I want to add an older tube type radio (ex: Collins, Drake, etc) to the array so I can have fun across all eras.
73,
?
David, WU3J
?
|
Re: 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
|
Re: Kenwood SM-230 Station Monitor
David-
Sorry- I misread your post title.? My monitor is a 220. You have the spiffy updated 230! My comment on the caps may not apply to your new-fangled? model.? I apologize for any confusion I may have caused.
73,
Tom ai4th
|
Re: Kenwood SM-230 Station Monitor
David, Very nice! I had one years ago and wish I had another. It was nice with my 850. Maybe some day I'll have another. Bob W4JFA?
I have tested the SM-230 and it seems to be working just fine. Below are screen captures on the two tone generator input to the oscilloscope function. First is the 1000 hz tone, then the 1575 hz tone with the third showing them combined. The fourth shot is a capture in monitor mode showing the SSB envelope. I'm still learning my way around the scope. Last time I touched a scope was the vintage boat anchor EICO's in high school. Earlier in my ham life I did pick up one of those from a show and I gotta say there's just something about a glowing tube staring at you that gives a warm feeling. It just can't be duplicated in today's LED displays. 73,
David WU3J
Hi, David,
?
Congrats on a very useful acquisition!? I went thru this same exercise last year- my unit worked as soon as powered up, but I noted 5 gray electrolytic capacitors on the board with splits and slight leakage.? Yellow replacements from an E-bay dealer were specifically recommended as replacements.? Easy, cheap fix!? If you look for this before you power up, would you please post or DM? me a pic of the interior of your unit in the area of those 5 capacitors?? I? pulled a blue wire loose and cannot figure out where it goes.? (It comes from the BS-8 unit.)
?
Good luck!
?
73,
?
Tom ai4th
|
Re: Kenwood SM-230 Station Monitor
I have tested the SM-230 and it seems to be working just fine. Below are screen captures on the two tone generator input to the oscilloscope function. First is the 1000 hz tone, then the 1575 hz tone with the third showing them combined. The fourth shot is a capture in monitor mode showing the SSB envelope. I'm still learning my way around the scope. Last time I touched a scope was the vintage boat anchor EICO's in high school. Earlier in my ham life I did pick up one of those from a show and I gotta say there's just something about a glowing tube staring at you that gives a warm feeling. It just can't be duplicated in today's LED displays. 73,
David WU3J
Hi, David,
?
Congrats on a very useful acquisition!? I went thru this same exercise last year- my unit worked as soon as powered up, but I noted 5 gray electrolytic capacitors on the board with splits and slight leakage.? Yellow replacements from an E-bay dealer were specifically recommended as replacements.? Easy, cheap fix!? If you look for this before you power up, would you please post or DM? me a pic of the interior of your unit in the area of those 5 capacitors?? I? pulled a blue wire loose and cannot figure out where it goes.? (It comes from the BS-8 unit.)
?
Good luck!
?
73,
?
Tom ai4th
|
Re: Kenwood SM-230 Station Monitor
Hi, David,
?
Congrats on a very useful acquisition!? I went thru this same exercise last year- my unit worked as soon as powered up, but I noted 5 gray electrolytic capacitors on the board with splits and slight leakage.? Yellow replacements from an E-bay dealer were specifically recommended as replacements.? Easy, cheap fix!? If you look for this before you power up, would you please post or DM? me a pic of the interior of your unit in the area of those 5 capacitors?? I? pulled a blue wire loose and cannot figure out where it goes.? (It comes from the BS-8 unit.)
?
Good luck!
?
73,
?
Tom ai4th
|
Re: Kenwood SM-230 Station Monitor
I have unboxed the SM-230 and plugged it in. It seems to be functioning, but I just have to obtain / make up cables to connect with my TS-850s. The manual refers to the TS-950, but i assume this can be used with the TS-850. What functionality besides monitoring the output and the band scope can I expect with the 850? Also for monitoring the transmissions should I have the SM-230 before or after the Alpha 87A? The specifications refer to a 5 minute limit at maximum attenuation. When the SM-230 is off OR the selector switch to any other function (i.e. band scope) will the RF pass through the SM-230 without overloading it? I would like to be able to monitor my waveform at legal limit for brief periods as necessary, but don’t want to blow up the SM-230.
73,
?
David, WU3J
|
Re: FS: Kenwood TS2000 HF/VHF/UHF satellite all mode with Rigblaster interface
Your reason for selling, please, as well as date of manufacture?
Does sub-menu 61B state "Off"?
On 3/16/25 13:15, John Geiger AF5CC via
groups.io wrote:
toggle quoted message
Show quoted text
I
have for sale a Kenwood TS2000 HF/VHF/UHF all mode radio,
which does 100 watts on HF, 6, and 2m, and 50 watts on 70cm.
It also will do full duplex for satellite operation. Has a
AM/FM subreceiver and will do dual receive so you can listen
to the local repeaters while operating HF or 6 meters. It
also has a built in autotuner, 2 antenna jacks for HF/6m
plus a receive antenna jack, built in CW memory keyer, TCXO,
IF DSP for noise reduction and narrow filters, and most
other features you would expect in an HF rig, plus you also
get these features on 2m and 70cm!
It
comes with a Rigblaster soundcard interface, the CAT control
cable with gender changer, and USB soundcard so you are
ready to go on the digital modes from 160 to 70cm. It has
been MARS modded so it will work on 60 meters also.
It
is in great operating condition. The bottom of the case has
some white marks on it. The top, sides, and face look good.
Has power cord and mic.
Asking
$825 shipped for all. Paypal/MO
?
73
John AF5CC
|
Bob
David
Tom ai4th
