Although I consider driver failures rare in Drake equipment, I would try swapping the driver first simply because 6JB6's are fairly expensive these days.? It does seem like your finals are about done, if the driver is good.
A healthy set of finals in any TR-3/4 should get you nearly 200W on 80 and 40 and at least 150W on 20.? Fresh tubes should be able to get you 150W or close to it on 10.? If they "only" give 100W or so on 10, I wouldn't replace them but yours sound like they're finished.? If there was one dud tube, you'd still get some decent power out, otherwise.
Steve Wedge, W1ES
Time flies like an arrow.? Fruit flies like a banana.
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On Monday, January 27th, 2025 at 2:28 PM, Dave KD5FX via groups.io <land.dave@...> wrote:
So, finally had some time to get back on this project, winter field day kept me busy over the weekend. And thanks to all in advance for everyone's help and suggestions on this project. I did all the Xmit tune up procedures on page 5-6 including the neutralization. I'm getting about 100 watts PEP output on 80/40/20 and around 15 on 15 meters while 28.0 and 28.5 bands have zero output and on 28.1 I only have 5 watts PEP output. I wonder if these tubes are bad. Does that sound like the symptoms of a nearly dead set if tubes? I haven't pulled them out for testing but I could if needed. OR? Is there something else I've missed? BTW it's still receiving OK on ALL BANDS!?
73, Dave KD5FX
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