[Drake] TR-7 Power output ?

[Joe (K9HDE)]

Rock, 


> Subject: [Drake] TR-7 Power output ? 
> 
> 
> I would like to ask the Drake group about the power output of 
> this rig. I have early model TR-7 that was upgraded to a 
> TR-7A via the Drake factory, supporting org documents prove 
> this. 

There should be no difference TR-7 vs TR-7A power output.

>I tried the rig out in CW mode.  I noticed that the 
> amount of power output into the dummy load an old but good 
> Heathkit Cantenna it is only putting out sixty watts? Should  
> not this output be higher? I can't test the output  in SSB or 
> AM mode, don't yet have a four pin connector for the mike.    
> 
What band(s) are you getting 60 Watts?  It might be worthwhile to list your
power by band, 160 thru 10. 

What is the indicated SWR on the MN-2700, by band? 

Is the CW level control advanced to the point that the green shutdown LED
(on the left side of the TR7) lit?

> I'm basing my reading from the meter on the rig and a 
> MN-2700, they both read the same so it's not a question if 
> there's a bad meter reading. The rig has not been in service 
> for the past five or so years. I have manual in route. Any 
> thoughts on this matter? One other question, when it is first 
> powered on the display does not lock onto the frequency. It 
> runs erratic for about a five second period  then stops at 
> the previous  set frequency. 

One of the two PLLs (one for below 14.5 MHz, the other for above) are
free-running.

My experience is that cleaning the contacts on the digital board helps the
lock-up speed.  These oscillators are located beneath the digital board and
I believe require extender boards to access.  I suggest deferring to expert
help when attempting to play with them.  

Take time to read the manual when it arrives.  8-) 

When you feel comfortable with the rig, measure the 10V bus.  The radio is
very sensitive to having the correct voltage on the +10V, +10R and +10T
lines.    

>The TR-7 seams be a very nice a 
> rig and the construction  is great. Not bad for something 
> with twenty year old technology. Another great product from 
> the boys at Miamsburg, Ohio.  Glad I have one now. 
> 
> Thanks for your response in advance.
> 
> Rock                

Joe, K9HDE   

>