Hi Don,
finally i did the reset of the radio and all the alignment procedures again. I managed to get the loudness of the sidetone ok (but i am still thinking one oft he T/ R diodes openes slowly ), but as a result now i have a strong „burst“ at every tone (only if hf is on). Even if the sidetone is off and hf is produced the burst is heard – it grows loude with the af gain, so it is produced before the AF amplifier – hope so.
You can see/hear it in this little video:
The burst is vy loud and a pain even in the headphones – so i keep on searching… and will look on the frontpanel U2 and so on…
Vy 73 Roland, DF1OE
Von: Don Wilhelm-4 [via Elecraft] [mailto:[hidden email]]
Gesendet: Samstag, 10. Januar 2015 04:08
An: Roland_DF1OE
Betreff: Re: K1 AF sidetone loudness problem ?
Roland,
I have never seen that kind of problem. It does sound like something
may be corrupt in the EEPROM.
You may want to try resetting the K1 to factory defaults (which wipes
out your menu settings and replaces them with the stock factory defaults).
Before you do that reset, record all your menu settings so you can
restore them - but some such as the CAL OPF values will have to be done
from scratch.
Do know that the sidetone level on the K1 does vary with the setting of
the AF Gain control, so if you are change the AF Gain during
transmission, the sidetone level may increase/decrease with the AF
gain. Still, a loud sidetone with SL L set to 1 should be very quiet.
If the reset does not correct it, I would first replace Front Panel U2,
next FP U1, and last FP U3.
73,
Don W3FPR
On 1/9/2015 9:57 AM, Roland_DF1OE wrote:
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