Author Topic: kw ts-940s am signal path  (Read 294 times)

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Offline METopic starter

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kw ts-940s am signal path
« on: November 23, 2025, 05:09:47 am »
would someone be able to highlight the am signal path on this attatched schematic?.
 

Offline RFDx

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Re: kw ts-940s am signal path
« Reply #1 on: November 23, 2025, 11:07:28 am »
For AM the balance of the product modulator (Schottky diode ring D73) is disturbed by a small DC voltage/current (R260=12k, C209=1u, R261=1k) applied to the AF port. From there the carrier + sidebands take the same TX path as the DSB-SC signal, with the difference that the AM IF-filters are selected instead of the SSB IF-filters. The exact carrier level is set by a trimmer (VR5=10k) on the switch unit (F).
 

Offline METopic starter

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Re: kw ts-940s am signal path
« Reply #2 on: November 23, 2025, 11:22:03 am »
Thanks but i meant for someone to mark the am tx path say using paint etc with a coloured line on the schematic pdf if thats possible?.
 

Offline tggzzz

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Re: kw ts-940s am signal path
« Reply #3 on: November 23, 2025, 12:46:43 pm »
Thanks but i meant for someone to mark the am tx path say using paint etc with a coloured line on the schematic pdf if thats possible?.

Stop being strategically helpless.
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
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Offline coromonadalix

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Re: kw ts-940s am signal path
« Reply #4 on: November 23, 2025, 05:48:25 pm »
and some of your threads have been blocked, you seem to push the forum limit a bit,  you've been warned a few times now

and you did dissect your original thread of your ham radio a few times now   .... aaaand got warned by a mod

don't use people(s) to do your homework ...
 


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