From:NFXQ96A@prodigy.com (MR CORY B MCDONALD)

Date:Sat, 31 Jan 1998 22:25:46, -0500

To:editor@qrz.com

Subject:Mars/Cap mod for Kenwood TM-V7A



   Remove the top and bottom covers and the detachable

face holder. Look at the p c board that is vertical behind

the front of the radio. There will be 2 small chip resistors

on the left side of the board. Carefully remove the one

with the number 0 . It will be the one closest to the left

near the grounding spring. You will probably have to scrape it off

with a pair of needle nose pliers. After you remove it

the TX should be VHF TX 136.995 - 173.995. RX should

be 118-174. UHF TX should be 410-469.995 RX should be

300-470.



---------------------------------------------------------

From:"Bowyer, Mike J" 

To:editor@qrz.com

Subject:Expanding the Kenwood TM-V7:A & E versions



Original TM-V7A Mod from NFXQ96A@prodigy.com (MR CORY B MCDONALD)

Additional TM-V7E notes from bowyermj@state.gov (Mike Bowyer)





Original TM-V7A Mod:

--------------------



Remove the top and bottom covers.



Look at the vertical p.c. board behind the front of the radio. There will be

2 small chip resistors on the left side of the board.



Carefully remove the one with the number 0. It will be the one closest to

the left near the grounding spring. You will probably have to scrape it off

with a pair of needle nose pliers.



After you remove it the VFO ranges should be:

VHF TX 136.995 - 173.995. RX should be 118-174.

UHF TX should be 410-469.995 RX should be 300-470.







Additional TM-V7E notes:

------------------------



There is a row of five numbered links on the edge of the front panel board.

In my E version radio, 0, 2 & 3 were made as standard. I now have only one

link fitted in the number 4 position which enables the repeater function not

defaulted in European versions. I have removed all other links.



I can now also receive the AM Aircraft band (118-137MHz). It is possible to

change from AM to FM by pressing the MHz button for 1 second. Plus I have

discovered doing the same key press (MHz for 1s) in the UHF band gives a

800-999Mhz RX band.



The European version has a 1750Hz tone-burst function, a modified band plan

for the auto-repeater shift function, adds a -7.6Mhz repeater shift and sets

the band limits to 144-146 & 430-440 - the AM Air band & 800Mhz bands are

disabled. All these European 'features' are lost when the radio is expanded.

(The repeater offsets are still programmable, but you must learn how to

whistle at 1750Hz). I think the only other difference between the A and E

versions is that the E version has an N type antenna connector fitted.



Making link number 5 causes the radio to power up in a Memory recall mode

(i.e., with channel numbers) and so is not overly useful!



I'm not sure exactly what links 0, 1, 2, & 3 all do individually! Maybe

other configurations are possible:any information would be gratefully

received.



As for RF performance, the front-end (and PA) must be tweaked to use

frequencies other than the factory alligned defaults, with a little tweaking

out of band performance should come good (at the expense of regular 2m/70cm

performance).



The chip resistors are SMD zero ohm things - a wire link (or solder blob)

will do the same job. They can be carefully removed (for re-use) by using a

fine tipped iron, de-solder braid, and a pair of long nose pliers or

tweezers. The front board can be carefully detached from the rest of the

radio to make removing the links easier.  





Mike Bowyer.

bowyermj@state.gov





I performed this mod and it works but you might want to add this footnote to

the mod, DTSS will be disabled. I no longer can use DTSS after having

performed this mod.



-----------------------------------------------------------------------



Here is something that's been on amateur radio mind's ok on the kenwood

tm-v7a while in crossband repeater mode you can put your tone's in you

remote to turn it off or to change frequencies without causing any

harmful interference to other user's on the repeater or simplex just by

turning off your tone off of your handie talkie (ht) and your remote

will hear your tone's and if you have'nt figured out how to do remote

thing just press the control button which is between the two band

selectors and press the power button on and there you go and then ca#

to turn it on to change freqs acd# to turn it on a000# once you number

your frequencies on your remote and remember them everything will be

ok. These are the things that the kenwood manual will not tell you.

~

Amsterdam



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