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Re: T-4X alignment


 

Halfway between 10 and 0.

Yes, checking the oscillator is next on the to do list.


73

Stan
KM4HQE

On 3/31/24 18:38, Steve Wedge, W1ES/4 via groups.io wrote:
Where is your RF TUNE setting at max?

I'm guessing you have no band oscillator...

Steve Wedge, W1ES/4

Time flies like an arrow.? Fruit flies like a banana.

Sent with Proton Mail secure email.

On Sunday, March 31st, 2024 at 7:14 PM, Stan Gammons via groups.io <buttercup11421@...> wrote:

I have a T-4X which has some odd problems. On 40 meters it will put out
100 watts, but the output on other bands, 80 for example is about 50
watts. On 75 meters output is like 10 watts. Output on higher bands is
also low. Weak finals? Yeah, I know it's not a real test, but the
Sylvania tubes check good with my B&K 707. The grid resistors are out of
tolerance. One reads 77 ohms and the other reads 84 ohms. I also found
that Drake failed to solder C51 which goes from V5 pin 1 to ground. But,
I doubt replacing the grid resistors and soldering C51 will fix the
problem I have. So, I'm looking at doing an alignment. My question is
what does Drake mean when they say detune T5 and T4 by touching an
insulated screwdriver on the rotor of S4A and S4B? Touch the
screwdriver on the switch shaft in front of those switch wafers?

73

Stan
KM4HQE






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