Serit dying

[M5TXJ]

Hi Noel,
Of course you can, we're all in this to help each other aren't we. You could also add that to repair the other F socket feed, the dc input pin to the NIM is the one directly below the one used in the photo.
73 Dave.

[g8gtz]

Done.

73
Noel

[radiogareth]

WIth my many and various 'connection things' since I built my MT I now have no volts on either pin A or B. My limited knowledge suggests that I can use a nominal 100uH inductor (most come out a lot lower, Chinese QC hard at work!) if I can't find (a) any ferrite beads (b) a 10uH unit.
I've some 1uH 800 ma SMD pellets but I calculate their reactance at 144MHz is only 1K. Be a LOT easier to solder in a through-hole unit.
Gareth

[HB9OBD]

Thank you Dave,

I've chosen this one:

Digikey code 495-5609-1-ND

73 Luca

[dh2va]

The 10 uH choke might be improving 146 MHz performance but I would expect it to be much worse at 2400 MHz. These kind of wired parts have a series resonance frequency much lower than 1 GHz so they appear as low impedance so I guess you have reduced sensitivity at the high end of the Serit's RX range.

[M5TXJ]

Hi ??? DH2VA

In direct comparison with the other input to the NIM there is no difference in performance according to the signal reports given by Minitioune on QO-100, I don't have 2.4GHz gear to try it there.

73 Dave.

[radiogareth]

Whats the rating/type number of the yellow thermal/self-resetting fuse?
Thanks
Gareth

[G8HKN]

Hi Gareth,
The circuit diagram says F2 is 300ma
The parts list says 300ma to 1A.
The suggested Digikey part number is
MF-R050-ND which is 60 V 500ma resettable.
Roger G8HKN.