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Dear 60M JT65a Users,

Please rememeber that you may only use the channel CENTER frequency and there may only be one QSO at a time on each channel. This applies to all modes including JT65A.

The ARRL FAQ  on 60M has a section with a heading "What modes can I use on 60M" that covers this here:


Check Part 97.303h for details. The one transmission at a time on the center frequency rule does seem like a waste of bandwidth but the reason behind it is explained in a letter from the NTIA to the FCC which can be found here:


JT65A is 174.9 Hz wide with the SYNC frequency on the LF edge. If you set WSJT-X to transmit with an offset of 1412 Hz, the center of your transmission will be 1412+(175/2) = 1499.5 Hz which is pretty much where you need to be.

(If you are still using JT65HF, set the software to transmit at +142 Hz or switch to WSJT-X).

The bandwidth on JT9 is 15.6 Hz. For your transmission to comply with part 97.303h, you need to set your TX frequency on WSJT-X to 1500-(15.6/2) = 1492 Hz when using the JT9 mode.

Also note that radios with pre-set 60M channels (e.g. The Yaesu FT950) display the channel CENTER frequency which is 1500 Hz above the suppressed carrier/dial freauency.

There is no definitition regarding how close to the center frequency we need to be but with modern day rigs there should be no reason why we can't get our 175Hz signal to straddle the channel center.

About me:

First licensed in 1972 as G8GSG. I was very active on 2M AM from Herstmonceux in Sussex, England in the mid 70s. Moved to London and could be heard on 2M SSB and FM from various QTHs including Wandsworth, Hammersmith, Earls Court and Kew.

Moved to California in '86 after taking my UK CW test and becoming G0ERY. Active in California on 2M and HF as W6/G0ERY.

Took my U.S. tests (all of them) on March 3rd, 2001 and became AD6VT.

Replaced that with the vanity call K6RBS (my initials).

Current equipment is an FT950, AL572 Amp (with 4 RFP 572Bs), MFJ 976 tuner and a G5RV @ 55' fed with ladder line.

I'm not an audio fanatic (folks running 4.5Khz wide ESSB drive me crazy - nobody needs to take up that much real-estate on the band).

I do however,like to hear and hopefully send crisp, clean audio that isnt excessively wide.

I use an W2IHY EqPlus box to add a little EQ, compression and downward expansion (to hide the fan noise from the AMP).

EQ in the radio is set to remove the muddy bass around 400hz and boost the highs.

The processor is on but reduced to 10%.

TX bandwith is set to 2.8 Khz for rag chewing (2.4 for contests).

My mic is an Audio Technica AT2020 (available from Guitar Center). It does require phantom power but it is an amazing mic for the price (< $100).

The MIC has no PTT switch so I use a foot switch from a Electronic Keyboard. I have an an FT857 which I use for backup and VHF/UHF.

I enjoy chasing DX and contesting as well as T hunting.

I need lots of States and Countries for WAS and DXCC on the WARC bands... pease call me if you hear me on.

73 de Richard


7893256 Last modified: 2017-02-11 06:58:43, 6655 bytes

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QRZ Logbook Summary for - K6RBS
Latest Contacts for K6RBS at QRZ.com
dedateband mode grid Country op
N7MNK 2012-11-27 160m JT65 DN18WQ United States ARTHUR O PUTNAM
K6CMG 2012-11-17 2m FM DM04xh United States Christopher M Goodman
K5WHR 2012-11-10 160m JT65 DM14 United States Dale A Robbins
N1EVK 2012-11-01 30M JT65 FN42iu United States ROBERT J BEAULIEU
JA8CQM 2012-10-31 10m JT65 PM74vv Japan Kingo Akimoto
N6NBV 2012-10-27 10M SSB DM13ep United States STEVE E GUEST
7Z1TT 2012-10-21 10M SSB KL91pm Saudi Arabia Hamdi M al qayed
KD4QHG 2012-10-19 10m SSB EM76dq United States MARK D WARREN
N4JAP 2012-09-30 10m SSB EM75jd United States John A Pless
K0CRF 2012-09-30 10m SSB EN16ou United States Timothy P Cruff
FO4BM 2012-09-22 10M SSB BH52cm French Polynesia Philippe GLOAGUEN
ZL2WL 2012-09-22 10m SSB RF80ki New Zealand WAYNE .Lester . WILSON
YC1EGP 2012-09-03 40m SSB PI06to Indonesia AGOES PRATOMO
W4LWY 2012-09-01 10m SSB EM66sd United States Jonathan K Burton
KJ6KHP 2012-08-26 40m SSB DM14hf United States Robert M Wall

Book Totals: 285 qso's   285 confirmed Get a free logbook at QRZ.COM

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Wed May 24 13:37:57 2017 UTC
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