From: "Don and Diana Cunningham" 
Subject: Re: Re: [drakelist] Tr-4 Low receive update


"Don and Diana Cunningham"  made an
utterence to the drakelist gang
----------------------------------------------------------------------
Matthew,
There is a #12 lamp, used as a fuse, in series with the antenna lead to the 
antenna changeover relay.  It is located in different spots in different 
serial numbered TR4's, but some are on the bottom of the chassis, near the 
antenna connector.  Others had it in the final compartment (watch for the 
high voltage if you have to go in there, hi).  The pins on these bulbs can 
corrode (or the bulb be open) and you will get the symptoms you describe. 
Have you cleaned the pins on this #12, and better yet, checked it for 
continuity??  It will make receive VERY low, hi.
73 and good luck,
Don, WB5HAK
----- Original Message ----- 
From: "Matthew E. McNeely" 
To: 
Sent: Monday, September 20, 2004 12:59 PM
Subject: Fwd: Re: [drakelist] Tr-4 Low receive update


>
> "Matthew E. McNeely"
 made an 
> utterence to the drakelist gang
> ----------------------------------------------------------------------
>
>>The switch is in the tranceive position and working correctly.
>
>
>
>
>
>>Let me ask the obvious, and the only reason I do is because it's caught be 
>>several times. What about the tranceiver/mute switch on the left rear 
>>corner?  Is it in Transceive position?  If you have it locked on. take the 
>>lock and move it back and forth a couple of times.
>>
>>Mark
>>
>>At 11:37 AM 9/20/04, you wrote:
>>
>>>"Matthew E. McNeely"
 made an 
>>>utterence to the drakelist gang
>>>----------------------------------------------------------------------
>>>Thank you for all the advice. I have tried cleaning all of the switches 
>>>including the band switch along with the tube sockets and peaking the 
>>>crystal oscillators 40,15 and 10 meter bands all are running between -.6 
>>>and - .7 vdc. I changed the 6ea8 tubes in the front end and the receive 
>>>on 15 and 10 seems somewhat better but still not up to snuff. I can hear 
>>>the crystal calibrator  but it is not giving me much on the s meter. I 
>>>can hear and make some contacts on 15 but when compared to a general 
>>>coverage receiver (not even a very good one) the s meter readings are 
>>>much lower on the TR-4.
>>>What am I missing here? someone wrote that I should peak the
band caps on 
>>>the effected bands. I am not sure where they are can someone tell me 
>>>where they are? and anything else that might be helpful to repair this 
>>>problem?
>>>I really love this transceiver. I find that whenever I can hear a signal 
>>>with it I can usually work them. I always get great signal reports even 
>>>without using my linear something I can't get with my Icom.
>>>
>>>Thank you,
>>>
>>>Matt
>>>
>>>----------------------------------------------------------------------
>>>On Behalf of "Matthew E. McNeely"

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>
> ----------------------------------------------------------------------
> On Behalf of "Matthew E. McNeely"

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