Thank you Patrick,
That email sure looks familiar ;-)? Hey, that was over 4 years ago, is it any wonder that this old man forgot it.
<>< 73 From "The Beaconeer's Lair" ><>
Specializing in DXing NDBs (Longwave Beacons)
Phil, KO6BB,
RADIOS:
YAESU: FTDX-101MP Xceiver, Dual SDR Receivers (~2020)
YAESU: FTDX-3000 Xceiver, DSP IF, 300Hz Roofing filter (~2019).
Icom: IC-718 Xceiver, DSP.
Uniden: SDS-200 Scanner, 25-1300MHz (2020)
Portables: Eton Elite 750 (2), AKA Grundig Satelite 750 (2020)
Sangean ATS-909X2 (2021), Tecsun PL-990 (2021)
ACC: MFJ-993B Auto Antenna Matcher.
HOMEBREW 4 Port Antenna Multicoupler, Feeds 4 RX's.
HOMEBREW Tunable LF-MF Pre-Amp.
ANTENNAS: 88 foot Long Ladder-line fed dipole, ~35 feet AGL for MW/HF.
Top Loaded Tee (Dipole fed as single element) ~35 Feet AGL.
Butternut HF-6V 6 Band Vertical, ~12 Feet AGL for 75-10M
Ratzlaff Active whip, 5 Foot Long, ~22 Feet AGL For LF/MW/HF.
Wellbrook ALA1530LN Loop For LF/MW/HF at ~17 Feet AGL
Diamond Discone ~35 feet AGL for Scanner.
QTH: Merced, California, 37, 18, 37N 120, 30, 6W CM97rh
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On 6/23/2022 10:54 AM, Patrick York wrote:
Phil,
I did a little digging and found this:
Re: Audio isolation transformer question
From: Philip Atchley <ko6bb1@...>
Date: Thu, 01 Mar 2018 11:15:15 EST
Hi,
I've used Triad SP-67 600:600 Ohm transformers with great success. Not cheap, but good quality, compact, and they seem to be well matched as images etc are nearly non-existent.
NOTE: I have my HRD set up to display 192KCs of bandwidth, there is a very narrow "notch" right on the LO frequency. That is determined by the low frequency cutoff of the transformer, but it also prevents the sharp "spike" that you may otherwise see at the LO frequency.
Think I got mine from Mouser Electronics.
73 From "The Beaconeer's Lair"
I hope this helps.
73,
Patrick KF4LMZ
