WD8BXS
alter Hase
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Posts: 286
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Version 6.3 issue
« on: 02. December 2019, 14:31:41 »
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Just finishing a ver 6.3
I have very low output on 20 meters.
10 mhz will give full output, but you have to drive it harder than usual.
I have triple checked the LPF and bandpass filter, no success.
Does anyone have any ideas where to look next?
Thanks,
Chuck
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| « Last Edit: 02. December 2019, 14:32:09 by WD8BXS » |
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Thanks,
De WD8BXS vy 73
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DL8EBD
positron
Urgestein
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Posts: 1926
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Re:Version 6.3 issue
« Reply #1 on: 02. December 2019, 15:38:00 »
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Chuk, maybe a fault in one of the CBT3253C?
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| « Last Edit: 02. December 2019, 16:22:59 by DL8EBD » |
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bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
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WD8BXS
alter Hase
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Posts: 286
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Re:Version 6.3 issue
« Reply #2 on: 02. December 2019, 15:54:13 »
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Very nice answer, I will change them out and see.
Thanks,
Chuck
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Thanks,
De WD8BXS vy 73
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SP3OSJ
Guest
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Re:Version 6.3 issue
« Reply #3 on: 02. December 2019, 16:03:15 »
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Hi
You used the wrong integrated circuits.
You have probably installed CBT3253 and you should use CBT3253C
Good luck!
Artur
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| « Last Edit: 02. December 2019, 16:03:36 by SP3OSJ » |
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DL8EBD
positron
Urgestein
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Posts: 1926
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Re:Version 6.3 issue
« Reply #4 on: 02. December 2019, 16:22:33 »
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Artur is right, this is a big difference between CBT3253C and CBT3253 without "C"!
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bitte keine technische Fragen oder Diskussionen via PN, dafür ist das Forum da.
vy73
Thomas
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WD8BXS
alter Hase
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Posts: 286
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Re:Version 6.3 issue
« Reply #5 on: 02. December 2019, 22:34:25 »
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Replaced both CBT3253C chips....No difference.
Chuck
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Thanks,
De WD8BXS vy 73
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OE3HKC
alter Hase
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Posts: 348
Ich liebe dieses Forum und meinen MiniTRX !!
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Re:Version 6.3 issue
« Reply #6 on: 03. December 2019, 07:00:43 »
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how is sensitivity of receiver part on 20m?
if ok, perhaps menu tx settings (20m) are wrong..
73
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wer immer strebend sich bemüht, dem wird es auch gelingen !!
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SP9BSL
positron
alter Hase
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Re:Version 6.3 issue
« Reply #7 on: 03. December 2019, 09:42:25 »
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Hi,
I would use oscilloscope, 14 MHz is not so high frequency. Just follow the path of the signal with oscilloscope probe using TUNE.
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73 Slawek
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