Date   

Re: Front end interference on the TM-D700E?

Brian Davies <briandavies@...>
 

Hi All

As a matter of interest this specific problem is not restricted only
to the D700 series, it happens on many different makes of amateur
radio. The problem is the front end is wide band and will let in lots
of unwanted frequencies.

The cure is to fit a bandpass filter in the antenna lead. These are
readily available from the major dealers - I got mine from W&S.

Should anyone require further information I will be pleased to supply
it. Surrey Raynet made careful technical investigation into this
problem some years ago and as I wrote a piece about for Radcom, I
suppose that would have been 18 months or more back.

73

Brian G3OYU

-----Original Message-----
From: Phil Manning [mailto:g1lkj@...]
Sent: Monday, April 23, 2001 1:27 PM
To: TMD700A@...
Subject: [TMD700A] Front end interference on the TM-D700E?

Anybody had problems with their 700E or 700A when in close proximity
to paging systems ( 154Mhz )etc on VHF and also breakthrough on UHF?

A friend of mine bought a 700E at the weekend and it seems to be
somewhat susceptible to this. AIP is set to off, putting it on acts
as a 10dB attenuator or so it seems.

I have one but do not use mine in a RF interference area as a base
radio. So I have no complaint.

Phil Manning G1LKJ ( in the UK ).


Re: Front end interference on the TM-D700E?

Michael Virgilio <mikev@...>
 

Info on the PAR filters is available from their web site:
 
 
Information available includes loss vs. frequency graphs, as well as VSWR graphs for 2M.
 
They do also have a 450MHz filter, if you're having problems with paging in that area as well.
 
Their filters are available at both Amateur Electronic Supply (www.aesham.com) and Ham Radio Outlet (www.hamradio.com), as well as other retailers.

-----Original Message-----
From: Rick Giguere [mailto:rick@...]
Sent: Monday, April 23, 2001 5:18 PM
To: TMD700A@...
Subject: Re: [TMD700A] Front end interference on the TM-D700E?

Anyone have a URL or other information on the PAR filters?


Thanks!


....Rick


Re: Front end interference on the TM-D700E?

Doug Bade <dbade@...>
 

In general I have found NO amateur radio's with 130-174 rcvrs, and 10-11 mhz IF's with .2uv sensitivity (130-174), (basically all new current models ) which do not get overloaded with paging RFI when near site's.. It is a tradeoff of sensitivity and lack of selectivity for intermod rejection, it seems to be a cost effective solution trade-off... AIP should block a lot of overload with minimal impact to local repeaters... That is their solution..... :-).. Doug KB8GVQ

At 12:26 PM 4/23/01 +0000, you wrote:
Anybody had problems with their 700E or 700A when in close proximity
to paging systems ( 154Mhz )etc on VHF and also breakthrough on UHF?

A friend of mine bought a 700E at the weekend and it seems to be
somewhat susceptible to this. AIP is set to off, putting it on acts
as a 10dB attenuator or so it seems.

I have one but do not use mine in a RF interference area as a base
radio. So I have no complaint.

Phil Manning G1LKJ ( in the UK ).



Community email addresses:
Post message: TMD700A@...
Subscribe: TMD700A-subscribe@...
Unsubscribe: TMD700A-unsubscribe@...
List owner: TMD700A-owner@...

Shortcut URL to this page:
http://www.onelist.com/community/TMD700A

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Re: Front end interference on the TM-D700E?

k5qq@...
 

In a message dated 4/23/2001 10:06:11 AM Mountain Daylight Time,
rick@... writes:

Anyone have a URL or other information on the PAR filters?


Thanks!
http://www.rf-filters.com/

They work great for me!

Jim K5QQ


Re: Front end interference on the TM-D700E?

Michael Virgilio <mikev@...>
 

YES! Defintely. I live about 3 miles from a building that has numerous paging transmitters at 152 and 158 MHz at 200+ watts, and whenever I drive by that building, I constantly get paging interference. Mostly on VHF - I don't tend to listen to UHF as much, but can't say that I've had any major interference there when I am listening.
 
Another local ham recommended the Par paging notch filters - attenuating 152-153 MHz over 50dB. They also have one that does 158-159 MHz as well as 152-153. They live a lot closer to that building, and they haven't heard a peep of paging noise since they put the filter in.
 
  - Mike, KG4JNA

-----Original Message-----
From: Phil Manning [mailto:g1lkj@...]
Sent: Monday, April 23, 2001 8:27 AM
To: TMD700A@...
Subject: [TMD700A] Front end interference on the TM-D700E?

Anybody had problems with their 700E or 700A when in close proximity
to paging systems ( 154Mhz )etc on VHF and also breakthrough on UHF?

A friend of mine bought a 700E at the weekend and it seems to be
somewhat susceptible to this. AIP is set to off, putting it on acts
as a 10dB attenuator or so it seems.

I have one but do not use mine in a RF interference area as a base
radio. So I have no complaint.

Phil Manning G1LKJ ( in the UK ).



Community email addresses:
  Post message: TMD700A@...
  Subscribe:    TMD700A-subscribe@...
  Unsubscribe:  TMD700A-unsubscribe@...
  List owner:   TMD700A-owner@...

Shortcut URL to this page:
  http://www.onelist.com/community/TMD700A


Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.


Front end interference on the TM-D700E?

Phil Manning <g1lkj@...>
 

Anybody had problems with their 700E or 700A when in close proximity
to paging systems ( 154Mhz )etc on VHF and also breakthrough on UHF?

A friend of mine bought a 700E at the weekend and it seems to be
somewhat susceptible to this. AIP is set to off, putting it on acts
as a 10dB attenuator or so it seems.

I have one but do not use mine in a RF interference area as a base
radio. So I have no complaint.

Phil Manning G1LKJ ( in the UK ).


Re: Front end interference on the TM-D700E?

k5qq@...
 

In a message dated 4/23/2001 6:30:48 AM Mountain Daylight Time,
g1lkj@... writes:

A friend of mine bought a 700E at the weekend and it seems to be
somewhat susceptible to this. AIP is set to off, putting it on acts
as a 10dB attenuator or so it seems.

Does setting AIP ON prevent the problem?

Unless you are working weak signal simplex operations, the decrease in gain
vs the increase in intercept point should help your problem without causing
any decrease in performance from local repeaters.

Another person wrote in to comment on the Par notch filters and I can attest
to the outstanding results they provide for earlier radios's where the AIP
feature is not available. As a series notch, they provide no problem to
dual band amateur operations but sure get rid of the annoying 152 MHz pagers.

Jim K5QQ


Re: MICROPHONE ALTERNATIVE

Rick Giguere <rick@...>
 

I'm always "losing" the PTT switch from my hand.

It's too big and of poor quality.


Really the worst piece of the rig.


...Rick

On Tue, 17 Apr 2001 wcartercpa@... wrote:

Does anyone have trouble with size of mic? Hard to keep it keyed?
Is there other Mics that work on the D700 that have up dwn keys? I
wish the mic wasn't so large.

Bill



Community email addresses:
Post message: TMD700A@...
Subscribe: TMD700A-subscribe@...
Unsubscribe: TMD700A-unsubscribe@...
List owner: TMD700A-owner@...

Shortcut URL to this page:
http://www.onelist.com/community/TMD700A

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Re: MIC Extension using network cable.

Rick Giguere <rick@...>
 

I made my own because I needed very short extensions, so I can't help you
there.

I tossed a mental coin and decided that I'd probably pick up less with the
short home-brews than with all that extra factory-made coiled up
someplace.


...Rick

On Tue, 17 Apr 2001 mfernand@... wrote:

Hi. I have had a TMD700 in hand for about 5 days. I'm looking to
install it in an extended (big 'ol RAM 1500). My question: Is there a
length limit for the mic cable? Actually, is there a length limit for
any of the cables (control head)??? BTW - I did not notice anything
in the posts referencing length limits for these home-brew
extensions. Comments?

Honestly, since reading through some of the problems, I'm almost
tempted to pay the $70 just to get the shielded stuff. I don't know
what noise is present in my "new" vehicle.

Thanks.

Manny Fernandez
N2ITR



Community email addresses:
Post message: TMD700A@...
Subscribe: TMD700A-subscribe@...
Unsubscribe: TMD700A-unsubscribe@...
List owner: TMD700A-owner@...

Shortcut URL to this page:
http://www.onelist.com/community/TMD700A

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


Re: MICROPHONE ALTERNATIVE

Dave Hadler
 

There are two Mics that plug straight into this rig. The MC-53DM and the MC-45DM. One is the standard fat mic and the other is the older slim mic that kenwood always used to use on their rigs. The slim one is full DTMF, works well and if anything is a little too sensitive. Unfortunately my dealer couldn't supply one with my rig so I had to go out and get one. For readers outside the USA (yes there are some of us) the fat mic that people are complaining about is only supplied to some markets - the USA being one. All other markets get the slim mic but not always the DTMF model.

Cheers from ZL land - last stop before the penguins :-)

Dave
ZL3TRX


From: wcartercpa@...
Reply-To: TMD700A@...
To: TMD700A@...
Subject: [TMD700A] MICROPHONE ALTERNATIVE
Date: Tue, 17 Apr 2001 16:01:44 -0000

Does anyone have trouble with size of mic? Hard to keep it keyed?
Is there other Mics that work on the D700 that have up dwn keys? I
wish the mic wasn't so large.

Bill
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.


Re: MICROPHONE ALTERNATIVE

Tom N4NW
 

Bill,

Someone else mentioned removing the foam insert within the spring inside the mic under the PTT bar. Myself and another ham have found that you can remove the foam AND the spring. The caution is that without the spring the weight of the mic is sufficient to key the PTT micro-switch (which has its own internal spring).

Therefore, should you decide to remove both the spring and the foam pad and you do not want your rig keying when you do not intend it to then make sure that you place the mic hanger in such a location that the PTT is clear and that you ALWAYS use the hanger when not using the mic.

I initially removed just the foam pad as suggested in another message - however, found that this still resulted in fatigue in my PTT finger on long commutes. Removing spring and pad make use of the MIC a simple task.

Now if there were a solution to the audio response of the DTMF mic all would be well with this part of the D700.

73's
N4NW

At 16:01 4/17/01 +0000, you wrote:
Does anyone have trouble with size of mic?  Hard to keep it keyed?
Is there other Mics that work on the D700 that have up dwn keys?  I
wish the mic wasn't so large.

Bill


Yahoo! Groups Sponsor

Community email addresses:
  Post message: TMD700A@...
  Subscribe:    TMD700A-subscribe@...
  Unsubscribe:  TMD700A-unsubscribe@...
  List owner:   TMD700A-owner@...

Shortcut URL to this page:
  http://www.onelist.com/community/TMD700A


Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.


Re: MICROPHONE ALTERNATIVE

Marc D Smith <mdsmith@...>
 

The mic size doesn't really bother me. I did have a problem keeping it keyed. I read an article somewhere (or maybe it was on a web site) that said there was a little rubber / sponge inside the PTT button spring. So, I took my mic apart and removed the black piece of rubber / sponge. Once I removed it, the mic was a LOT easier to use and keep keyed. As a matter of fact, I don't think I have accidently unkeyed since!

Just some food for thought before you buy a different mic.



Marc

73, de kc8ort

At 04:01 PM 4/17/01 +0000, you wrote:
Does anyone have trouble with size of mic? Hard to keep it keyed?
Is there other Mics that work on the D700 that have up dwn keys? I
wish the mic wasn't so large.

Bill



Community email addresses:
Post message: TMD700A@...
Subscribe: TMD700A-subscribe@...
Unsubscribe: TMD700A-unsubscribe@...
List owner: TMD700A-owner@...

Shortcut URL to this page:
http://www.onelist.com/community/TMD700A

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/


MICROPHONE ALTERNATIVE

wcartercpa@...
 

Does anyone have trouble with size of mic? Hard to keep it keyed?
Is there other Mics that work on the D700 that have up dwn keys? I
wish the mic wasn't so large.

Bill


MIC Extension using network cable.

mfernand@...
 

Hi. I have had a TMD700 in hand for about 5 days. I'm looking to
install it in an extended (big 'ol RAM 1500). My question: Is there a
length limit for the mic cable? Actually, is there a length limit for
any of the cables (control head)??? BTW - I did not notice anything
in the posts referencing length limits for these home-brew
extensions. Comments?

Honestly, since reading through some of the problems, I'm almost
tempted to pay the $70 just to get the shielded stuff. I don't know
what noise is present in my "new" vehicle.

Thanks.

Manny Fernandez
N2ITR


Re: MIC Extension using network cable.

n0hzn@...
 

I used cat 5 network cable to extend the mike cable and it has worked fine.
It's a relatively short piece. I ran it from under the passenger seat in a
Dodge Caravan to the center console in the dash, maybe 6 ft total. Very cheap
and works like a charm.

John - n0hzn


Re: Strange problem

Jean Pierre Magnan <incendie@...>
 

On 4/5/01 12:26 AM, "Dave Hadler" <dave_hadler@...> wrote:

Your GPS is probably displaying magnetic bearing and the D700 displaying
true bearing. Change your GPS to display TRUE unless your using it with a
compass. If this is the problem then I suspect you have never used your GPS
with a paper map to figure out where you are going:-)

Cheers Dave
Well, as many of you have pointed out, it was definitely the magnetic
bearing that was at fault. Actually, it was me who was at fault 8-))). And
as Dave also pointed out, I have never used my GPS with a paper map to
figure out where I was going. I did attend a compass & map class 15 years
ago but I really never had the chance to use what I had learn at the time.

After setting my GPS to show True North, everything is working as expected.

Now, if only I could find my way back to that road I saw a while back, I
could probably get home in time for supper !!! LOL

As always, thanks for your help and stay safe !

73 de VE2JPT

Jean-Pierre
________________________________
Jean-Pierre Magnan
VE2 JPT (Basic and 5 wpm)
Lieutenant, Notre-Dame-du-Mont-Carmel VFD, Québec, Canada G0X 3J0
email: incendie@...
URL: http://famille_magnan.tripod.com (Go take a look -> Sorry it's in
french for now)

The opinions expressed above are mine, all mine.
But I love to share them 8-)


Re: Strange problem

Jean Pierre Magnan <incendie@...>
 

On 4/5/01 7:20 AM, "philip yanov" <phil@...> wrote:

Could the course deviation be explained by the difference between magnetic
north and true north?  I seem to remember my Garmin allows me to choose
which north I want.  My Garmins do not seem to be Daylight Savings Time
aware, (nor is the D700) I have to adjust them myself. So for a couple of
days each year I think about setting everything to UTC.

-philip, K4PJY
UTC-4 (for now.)

Deviation: That would make sense. I didn’t think about  this one before.  I’ll take a look and I’ll let you know.

As far as setting everything to UTC, that also makes sense. And since my car clock is always set to the correct local time, I do not have to rely on my GPS clock to arrive on time for my appointments !!! I’ll think about this one also...

Stay safe !

73 de VE2JPT

Jean-Pierre
________________________________
Jean-Pierre Magnan
VE2 JPT (Basic and 5 wpm)
Lieutenant, Notre-Dame-du-Mont-Carmel VFD,  Québec,  Canada   G0X 3J0
email: incendie@...
URL: http://famille_magnan.tripod.com (Go take a look -> Sorry it's in french for now)

The opinions expressed above are mine, all mine.
But I love to share them  8-)


Re: Strange problem

philip yanov <phil@...>
 

Could the course deviation be explained by the difference between magnetic
north and true north? I seem to remember my Garmin allows me to choose
which north I want. My Garmins do not seem to be Daylight Savings Time
aware, (nor is the D700) I have to adjust them myself. So for a couple of
days each year I think about setting everything to UTC.

-philip, K4PJY
UTC-4 (for now.)


Message: 4
Date: Wed, 04 Apr 2001 22:05:25 -0400
From: Jean Pierre Magnan <incendie@...>
Subject: Strange problem

I have finally hooked up my Garmin II+ to my rig earlier this week.
Everything works just perfectly except for a slight difference (20 degrees)
in the direction I am going (bearing). For example, when I'm coming home,
the bearing is 60 deg (east of course). On my TM-D700, it shows 40 degrees.
Everywhere I go, the TM-D700 will show 20 degrees less than my GPS.

I have tried to figure this on out but I can't. Has it happened to someone
else on the list ?

Also, this one is off topic but I thought I ask anyway. How do I get my
Garmin II+ to compensate for the daylight saving time ? I tried to find a
way in the menus but I didn't see it. I thought of changing my time zone but
it just doesn't seem the right solution. Any idea out there ?

Stay safe !

73 de VE2JPT

Jean-Pierre
________________________________
Jean-Pierre Magnan
VE2 JPT (Basic and 5 wpm)
Lieutenant, Notre-Dame-du-Mont-Carmel VFD, Qu�bec, Canada G0X 3J0
email: incendie@...
URL: http://famille_magnan.tripod.com (Go take a look -> Sorry it's in
french for now)


Re: Strange problem

Dave Hadler
 

Your GPS is probably displaying magnetic bearing and the D700 displaying true bearing. Change your GPS to display TRUE unless your using it with a compass. If this is the problem then I suspect you have never used your GPS with a paper map to figure out where you are going:-)

Cheers Dave



From: Jean Pierre Magnan <incendie@...>
Reply-To: TMD700A@...
To: <TMD700A@...>
Subject: [TMD700A] Strange problem
Date: Wed, 04 Apr 2001 22:05:25 -0400

I have finally hooked up my Garmin II+ to my rig earlier this week.
Everything works just perfectly except for a slight difference (20 degrees)
in the direction I am going (bearing). For example, when I'm coming home,
the bearing is 60 deg (east of course). On my TM-D700, it shows 40 degrees.
Everywhere I go, the TM-D700 will show 20 degrees less than my GPS.

I have tried to figure this on out but I can't. Has it happened to someone
else on the list ?

Also, this one is off topic but I thought I ask anyway. How do I get my
Garmin II+ to compensate for the daylight saving time ? I tried to find a
way in the menus but I didn't see it. I thought of changing my time zone but
it just doesn't seem the right solution. Any idea out there ?

Stay safe !

73 de VE2JPT

Jean-Pierre
________________________________
Jean-Pierre Magnan
VE2 JPT (Basic and 5 wpm)
Lieutenant, Notre-Dame-du-Mont-Carmel VFD, Qu�bec, Canada G0X 3J0
email: incendie@...
URL: http://famille_magnan.tripod.com (Go take a look -> Sorry it's in
french for now)

The opinions expressed above are mine, all mine.
But I love to share them 8-)
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.


Strange problem

Jean Pierre Magnan <incendie@...>
 

I have finally hooked up my Garmin II+ to my rig earlier this week.
Everything works just perfectly except for a slight difference (20 degrees)
in the direction I am going (bearing). For example, when I'm coming home,
the bearing is 60 deg (east of course). On my TM-D700, it shows 40 degrees.
Everywhere I go, the TM-D700 will show 20 degrees less than my GPS.

I have tried to figure this on out but I can't. Has it happened to someone
else on the list ?

Also, this one is off topic but I thought I ask anyway. How do I get my
Garmin II+ to compensate for the daylight saving time ? I tried to find a
way in the menus but I didn't see it. I thought of changing my time zone but
it just doesn't seem the right solution. Any idea out there ?

Stay safe !

73 de VE2JPT

Jean-Pierre
________________________________
Jean-Pierre Magnan
VE2 JPT (Basic and 5 wpm)
Lieutenant, Notre-Dame-du-Mont-Carmel VFD, Québec, Canada G0X 3J0
email: incendie@...
URL: http://famille_magnan.tripod.com (Go take a look -> Sorry it's in
french for now)

The opinions expressed above are mine, all mine.
But I love to share them 8-)