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[aprssig] Does anyone have a fix for the intermittant tone encoder on the TH-d7ag 70cm side?

Robbie, wa9inf mwrobertson at comcast.net
Sun Mar 18 15:41:00 UTC 2007


Thomas,

I know others have been responding to this, but I will add my comment as 
well... I bought my D7 not long after they were released, and I must 
have received a good one, as after all these years, using 70cm as much 
as I use vhf, not once has anyone ever said I drop out of the repeaters 
on either band. (Qualified, maybe some times they said I was very noisey 
and not holding the repeater) Go figure, and I was not aware of this 
happening..

Robbie

Thomas t wrote:

> Does anyone have a fix for the 70cm tone encoder problem on the TH-D7ag?
> Every rig I have tested has had the problem, but I don't think I have 
> tested any rigs manufactured in 2006 or latter. The problem was also 
> reported on European d7ags.
> This problem prevents me from using the d7ag as a rig because my 
> club's repeater is on 440 and uses TSQ.....the tone encoder problem 
> makes me drop out too much.
> Kenwood is aware of the design defect, but has no fix. My ht died on 
> the operating table at home during my own work after Kenwood's 3 
> attempts at fixing the problem with some experiments amounted to 
> naught. I was frustrated with Kenwood, but I guess they did try. I 
> would buy the rig again if current production doesn't have the 
> problem, although last year I tested one at a local shop and it too 
> had the problem.
> In case you aren't familiar with the tone encoder problem on 70cm, you 
> can experience it by following this procedure:
> 1. Set a second radio (I used a Yaesu FT-817) to 446.000mhz WITHOUT 
> TONE SQUELCH SET.
>
> 2. Set the TH-D7A(G) to transmit on 446.000mhz with tone encoder set 
> to a tone of 136.5.
>
> 3. While holding down the PTT on the TH-D7A(G), lightly tap your palm 
> against the face of the radio as if you were clapping your hands 
> repeatedly (or tap your fingers hard repeatedly on the face of the 
> TH-D7A(G)), LISTEN TO THE SECOND RADIO AND HEAR YOUR FINGERS TAP THE 
> TH-D7A(G)- NO PROBLEM. Now go to step 4.
>
> 4. Set the second radio (I used a Yaesu FT-817) to 446.000mhz WITH 
> TONE SQUELCH SET TO 136.5.
>
> 5. While holding down the PTT on the TH-D7A(G), lightly tap your palm 
> against the face of the radio as if you were clapping your hands 
> repeatedly (or tap your fingers hard repeatedly on the face of the 
> TH-D7A(G)), LISTEN TO THE SECOND RADIO AND YOU WILL NOT HEAR YOUR 
> FINGERS TAP THE TH-D7A(G) REPEATEDLY BECAUSE THE SECOND RADIO’S 
> SQUELCH WILL BE CLOSED OR WILL CLOSE INTERMITTENTLY.
> Thanks for your input,
> Tom- N2YTF
>
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