Have you tried doing the alignment on 80/75 per the manual? ?I believe it is set up pretty high in the band.
I agree that you¡¯re probably dealing with old finals based on the high band figures.
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
On Thu, Apr 4, 2024 at 12:01 PM, Stan Gammons via groups.io <
buttercup11421@...> wrote:
I got around to replacing the grid resistors. I get the following
now.
3.5 Mhz -75 watts
3.98 Mhz - 30 watts
7.2 Mhz - 100 watts
14.2 Mhz - 100 watts
21.2 Mhz - 40 watts
28.7 Mhz - 10 watts
Unsure why the power drops off on the upper end of 80/75 meters.
I'm sure the low power on 15 and 10 meters is due to weak finals.
73
Stan
KM4HQE
On 3/31/24 19:11, Steve Wedge, W1ES/4
via groups.io wrote:
Check your other bands.
We need to know if your band oscillator is kaput.
Steve Wedge, W1ES/4
Time flies like an arrow. Fruit flies like a banana.
On Sun, Mar 31, 2024 at 19:42, Stan Gammons via groups.io <buttercup11421@...>
wrote:
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
>>
>>
>>
>>
>>
>
>
>
>
