intek497 (dragon ss-497) Low level on Rx s-meter

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mr.alex
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Joined: Tuesday 2nd Aug 2011, 0:54
First Name: alessandro
Location: italy
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intek497 (dragon ss-497) Low level on Rx s-meter

Post by mr.alex »

Radio Make and Model: intek497 (dragon ss-497)
PCB Number: n.c
PLL Number: n.c

Symptoms:
When the RTX is in RX state, i see the signal at +4db and more
on s-meter only if i receive a strong signal.
But for the less +4db signal, i see 0db on s-meter..leaving open
clockwise RF-Gain .

What is working:
rx and tx area working correctly

What has been tried:
1- the RTX is aligned on TX and RX, using a professional Rf-Generator
like Marconi-2022.

2- The audio is not distorced.

3- i have already checked all diodes around BA72B (ic) and Q6, Q11,
Q24, Q7..this transistors area is ok.

4- I have also checked around RX
between Q80 to Q15, seems all ok.

Did it suddenly happen ?:
it's a 2nd hand RTX.

Anything else that may be of help?:
everybody

Regards
Alex (italy) 8)

ps. sorry for my not strong english.
Attachments
schema_497.pdf
Schema of intek-497 European version
(651.13 KiB) Downloaded 634 times
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