Re: IC7000 no HF Transmit
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Andrew I am retired but sometimes household task take priority.? I can discuss radio things most afternoons.
I did measure the transformer output in CW mode at 28 MHz and saw 6+ watts and 20amps.
I have found that my oscilloscope is old and not accurate, but is good for a relative measurement that shows the L305 input voltage is higher than the output.? I also verified this with a VTVM. ? I can’t argue that the L305 maybe bad, but is of robust construction with the secondary windings shielded coax.? I did check continuity of the primary to the secondary.? Which shows a good open circuit.
I can’t explain why the 6 watts does not pass through the rx/tx relay and the HPFs.
Oh !!!
Well done how much current was it drawing when you were measuring 6 Watts, now you can put a watt meter try FM or CW see if you get 100 Watts.
If the rig draws 20 Amp and you are only getting a few Watts, then the transformer is faulty in some way.
Order a new transformer any way, then you can move with fault finding.
If you saw 6 Watts at the output of the transformer, then why was it not at the aerial socket?
73
Andrew
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On 27 Jan 2025, 23:27, at 23:27, "Tommy Wooten via " <kf4rwg=[email protected]> wrote:
>Andrew
>I removed the PA board, separated the transformer and reinstalled the
>board
>so I could access the transformer output on the top side.? See photo
>attached.
>
>Tommy
>
>On Mon, Jan 27, 2025 at 5:42?PM Andrew Lenton via <a=
>[email protected]> wrote:
>
>> Yes indeed,
>>
>> CW or AM would be my preferred option, also you need a PEP Watt
>meter.
>>
>> KR
>>
>> Andrew
>>
>> ?Get BlueMail for Android ?
>>
>> On 27 Jan 2025, 22:35, at 22:35, "James Tiberius via "
>> <nono2212000=[email protected]> wrote:
>> >In SSB mode current draw should be low until audio is being
>modulated.
>> >I would expect high current draw when using carrier modes
>> >
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