Closed alain00091 closed 1 year ago
???
Hi, maybe have a look here: https://github.com/eried/portapack-mayhem/wiki/preamplifier-ic-replacement#rx-problems
and come back to tell us, tnx.
Ho yeah. @f1ghy is right. You may have a fried amp somewhere.
YES you are right !!!, it is a HARDWARE FAILURE/BUG I checked with very old release of portapack, and also with SDRSHARP
What is amazing is that it works , I see the gain increasing if amp = 0 and decreasing if amp= 1 So the only problem is that it is INVERTED !!! I will not desolder the RF Preamplifier u13 (MGA-81563) , it is too small for my eyes Thanks a lot for your support
Then @alain00091 , although you did not replace it , can we close that issue?
Thanks
Yes you can close it and sorry
No problem at all . No need any sorry . Thanks to @f1ghy and to you , for your confirmation. We hope that you could find some close friend able to help you to repair it. Cheers
(Please try the latest nightly release before submitting this. You can find the latest nightly version here: https://github.com/eried/portapack-mayhem/releases)
Describe the bug AMP is inverted
When AMP = 0 it should be 0 dB amplification in receive mode (no gain/amplification) When AMP = 1 it should be +14 dB amplification in receive mode
and now if it is 0 it is + 14dB ....
To Reproduce Steps to reproduce the behavior:
audio with good freq, see the RSSI bargraph ...
Expected behavior A clear and concise description of what you expected to happen.
Affected versions Please write any difference related with the Expected behavior, on the following versions:
try it with 231013 bin or 1.7.4
Additional If the bug is difficult to explain, additionally to the text please include images and videos.