You can generally see the jumper without removing the bottom case. In
my TR3's, the jumper was routed across the top of the connector. In
another it went around the side..but both were visible thru the cutout.
Curt
On 3/27/2012 4:35 AM, Dave, WV9E wrote:
*Hello to the group.*
**
* Hooking up RV-4 to first version TR-4, (no noise blanker in lower
right) 26000 s/n.*
* Dial lamp and tube do not light. I test fed the*
*circuit (pins 7 & 8) lamp lit and tube heaters*
*started to glow.. so cable is good.*
**
* I read that the TR-3 had a jumper internal on the VFO jack (between
2 & 8 orange and white) and this needs to be cut. As I have heard
the first tr4's were actually just updated tr3's does this jumper in
place cause my issue w/ no power to lamp/tube heater?*
**
* I know this is probably a look and see thing, but before I take the
cover off, maybe someone else has seen this and I am wrong about my
assumption and should be looking elsewhere.*
**
*tnx.,*
**
*73,*
*Dave, WV9E *
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