[Drake] Re: TR7

[ik2bcp - Guido Tedeschi]

My sidetone problem is solved adjusting the trimmer: there was no sidetone
because the oscillator was set to zero beat... :-(
By the way, the "famous" TR7 is now repaired and calibrated, many slugs were
not correctly aligned.
I'm now a little more expert on TR7 and I learned also that his final amp
has not a flat frequency response ;-)
73 and thanks to all for the great help!
Ciao
Guido, ik2bcp

----- Original Message ----- 
From: "Garey Barrell" <k4oah at mindspring.com>
To: "HENRY PFIZENMAYER" <pfizenmayer at worldnet.att.net>
Cc: <Drake at mailman.qth.net>
Sent: Tuesday, February 15, 2005 3:51 PM
Subject: [Drake] Re: TR7


> Hank -
>
> I believe you're correct.   I can't find ANY mention of it in the 
> operating manual!   The way it's hidden, maybe we're not supposed to know 
> about it....  :-)   It IS mentioned in the Service Manual, says to set for 
> an 800 Hz tone.   I'll have to look and see if this actually sets the 
> offset or if it's just to "match" the sidetone to the offset so you 
> "listen in the right place" for transceive.
>
> The manual DOES however say that you adjust the sidetone level with the 
> "front panel AF GAIN control".
>
> Thanks for pointing that out!
>
> 73, Garey - K4OAH
> Atlanta
>
> Drake C-Line Service Manual
> <http://hr99.home.mindspring.com/R-4C_Servicez/>
>
>
>
> HENRY PFIZENMAYER wrote:
>
>>Gary -- Without dragging out my manual , I am pretty sure  the trimmer cap
>>you reach thru the key jack is just to set the freq of the offset
>>oscillator - at least its that way on my TR7 - never found any secondary
>>adjustment on sidetone audio level.(My offset osc xtal finally moved 
>>enough
>>I had to remove the fixed cap across the trimmer cap to get the CW offset
>>close to where I wanted it. )
>>
>>
>>FWIW -- Hank K7HP
>>
>>
>>
>>
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