Modifications for Audio-Frequency Amplifier

The plots "BEFORE" and "AFTER".

BEFORE "AF-Amp-mod"
BEFORE "AF-Amp-mod"
AFTER "AF-Amp-mod"
AFTER "AF-Amp-mod"

IF-amplifier buffer modification.

The plots "BEFORE" and "AFTER".

BEFORE "RX IF-DSP-buffer-Mod"
BEFORE "RX IF-DSP-buffer-Mod"
AFTER "RX IF-DSP-buffer-Mod"
AFTER "RX IF-DSP-buffer-Mod"

1-st mixer modification.

2-nd mixer modification.

2-tone in-band IMD-test BEFORE and AFTER all of these modifications.

2-tone IMD BEFORE Mod's.
2-tone IMD BEFORE Mod's.
2-tone IMD AFTER mod's
2-tone IMD AFTER mod's
2-tone IMD AFTER mod's
2-tone IMD AFTER mod's

Write a comment

Comments: 2
  • #1

    Andy (Monday, 10 May 2010 23:51)

    GE

    Krasota. Budu zanimatsa, obiazatelno.
    Moj K-3 nomer: 2201.

    Best 73 Andy SP5DIR

  • #2

    Jan (Tuesday, 18 May 2010 14:11)

    Hi Alex, I implemented all possible upgrades on my K3 except
    for 1st and 2nd mixer modifications. Could you describe them shortly please?
    Best regards

    Jan OM2XW
    om2xw@hotmail.com