I haven’t operated my GRC-9 much in the end fed half wave long wire field antenna setup (which is what the associated segmented and jumpered antenna used in the military actually is) but recall that the neon bulb output indicator always was noticeably much brighter with the output network set up for that mode vice the dipole/doublet or short whip modes.  In each case just tune for max!  IIRC the tech manual may have noted that lamp brightness will be different depending on the antenna network tuning mode.

73 de Chris AJ1G
Sent from my iPhone

On Nov 21, 2024, at 09:24, Ray Fantini via MRCA <[email protected]> wrote:



 

Figure I would post a couple pictures of some of the radios that have been under discussion. This is the French set with the one good bulb that I have now. It appears brighter in this picture then it doses in real life but maybe that’s something wrong with me, who knows? The picture was at 7.0 MHz at around twelve watts into fifty Ohms. Still get good glow in HI/Low CW and AM so think new bulbs will help the other radios with week or non-working bulbs I can swap the good bulb around and know the issue is the bulbs and not the circuit. Same thing with the VR150/0C3 The next issue is gaining access to the band switching assembly in one of the transmitters to try to clean that up. So far, I have not come acrost any Whisker Growth but have noticed that the Frenchie was never shot with MFP like all the US sets and have some issue with corrosion throughout the receiver. It has good sensitivity on band one (40 meters) but sucks on band two (80 meters) and band three. Also noticed on the receivers that they appear to have an issue with strong signals pulling the osculator, it’s that or the backlash on the tuning not right but it’s annoying when tuning and the signal appears to shift up or down. Although it’s only a small amount still not right. Anyone else had issues with backlash on the receiver?

 

Ray F/KA3EKH

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