From: Garey Barrell 
Subject: Re: [drakelist] TR7 Volume


Gerry wrote:

> The ON/OFF switch ganged with the volume control was very common at the
> time. I can't fault the Drake engineers for following what was common
> practice. Besides we don't know what kind of pressure they may have been put
> under to follow the dictates of the owners or the accountants. In my 34
> years of experience in Electronics Engineering I have often found that good
> engineering practice gets tossed by the wayside if there is a chance of
> saving a few cents worth of material. Of course that translates to lower
> selling price and more profits and money for you know who. Hint: it's not
> the engineers. With regards to the audio problem, I was able to reduce it
> considerably by rerouting the volume control to just ahead of the LM380
> input. The downside is it involves cutting some traces and adding jumpers.
> Additionally, AM audio level is not as loud. It all comes down to what you
> can live with I guess. 
> 
> -----Original Message-----
> From: owner-drakelist{at}www.zerobeat.net
> [mailto:owner-drakelist{at}www.zerobeat.net] On Behalf Of Jim Shorney
> Sent: Tuesday, January 27, 2004 5:37 PM
> To: drakelist{at}zerobeat.net
> Subject: Re: [drakelist] TR7 Volume
> 
> 
> On Tue, 27 Jan 2004 08:44:44 -0500, Garey Barrell wrote:
> 
> 
>>Only way to fix it that I know of is to take the switch off the control!
> 
> What 
> 
>>were they thinking!?!?
> 
> 
> Actually, in the commercial radio biz, that's a feature, not a bug. 
> Keeps dispatchers from turning the volume clean off...
> 

Gerry -

Certainly valid point re: how "engineering" decisions are not
always the final 
word!  :-)

However, Drake (and most other manufacturers, including Collins) did NOT put the 
AC power switch on the receiver's AF Gain control.  I guess the shortage of 
panel space on the transceivers forced them into it.  The Drake 1-A got around 
the problem by using a push-pull switch on the AF Gain control!!

I just back off the RF Gain on the TR-7 to turn it "all the way down".

73, Garey - K4OAH
Atlanta


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