ad: CQP123-1
Please login help/register callsign: password: secure login
Database News Forums Swapmeet Resources Contact
 19:09:01 UTC 27 Aug 2014 
Advanced Search Current Hot Callsigns XML Logbook Data QSL ListMaker Database Downloads DX Spotting Network Ham Club Database QSL Corner Top Web Contacts Expired Callsigns QRZ's 1993 FCC Database Daily Update Reports Just Added Callsigns Database Help Forum
Amateur Radio News General Announcements Special Events, Contests, etc. Hamfests and Conventions Silent Keys Headlines
Forums Home Discussions, Editorials, Talk Technical Forums Logging and Contesting RV and Mobile Help Forums
Ham Radio Gear for Sale Ham Made Gear General Merchandise Swapmeet Hot List Ham to Ham References Stolen Radios, Scams and Rip-offs
Site Menu... Practice Amateur Radio Exams Amateur Radio Study Guides Online License Renewals License Wall Certificates Commercial Ham Radio Links DX Country Atlas Grid Mapper Ham Radio Trivia Quiz Life Member Honor Roll
Help Desk, for accounts, lost passwords, etc. Add your callsign to QRZ Subscription Services Users Help Forum Frequently Asked Questions - FAQ QRZ en Espanol Privacy Statement Advertise with QRZ List of Current Advertisers About QRZ Donate to QRZ Contact us
ad: L-HROutlet
ad: l-assoc
ad: l-Waters
ad: l-rl
ad: l-sarc
ad: l-WarrenG
ad: l-gcopper
ad: l-innov
ad: l-tentec

Login is required for additional detail.

Email: Login required to view

Ham Member Lookups: 11982

QSL image for K5WHR



Get more TX audio from your IC-718. Look below...

Station Location - Single story apartment

Radio 1 : Icom IC-718

Headset : Heil Proset IC

Tuner : MFJ-901B 200W tuner

Antennas: Ground mounted vertical.Tunes & works 80M - 10M. Antenna is 15 feet high top loaded with ground screen and tuned radials.

Software: HRD for logging and DX spotting, JT-Alert & WSJT-X for JT65 and JT9

Digital modes: PSK-31 (20-60 watts) 80M-10M, JT65 (10-40 watts) 80M-10M, SignaLink USB interface

JT9 (15 watts) 20M just started using this mode 4/28/2013, use WSJT-X for this mode along side (JT-Alert forWSJT-X)

See where your digital signal is being heard http://www.pskreporter.info


Interresting reading

Antenna Height and. Communications Effectiveness

RFI Tips and Tricks


Eliminating RF feedback


Antenna Construction

US Frequency allocation chart


Station setup



Center loaded vertical (better efficiency than base loading) 14' 80-10M with capacitance hat, helps distribute RF current along more antenna. Still a compromise antenna but works better than nothing. The center loading coil is used to resonate the antenna on 10M - 80M. It is a home made coil made of 50' #12 AWG copper wire round 4.5" OD 5" length. The ground plane is aluminum screen and 2 wire radials. The coax choke sitting on the ground keeps the RF at the antenna and not on the coax. All PVC is SCH 40 1" tube. Everything to make this antenna was purchased from LOWES except the coax and the SO-239. The wire is 16 AWG. The antenna has worked across the US on 80M JT-65 and into Europe on 40M. The small rod mounted half way is switched in to match the antenna on the higher bands.


The antenna in action on 80M JT65 running 50 watts


Icom IC-718 TX audio mod, resistor value to be replaced is very close to the value used in the IC-756PROIII mic amp circuit giving it more gain. The capacitor in parallel with R2211 in the IC-756PROIII mic amp circuit is a 100pF and not a 470pF as in the IC-718. May have slightly different TX audio characteristics than the 756PROIII if not changed. Schematic below is from the IC-718 service manual which can be downloaded by googling it.

This mod will give you all the modulation you need to kickup a little better average SSB signal on TX.

The surface mount resistor to be completely removed. Not an easy task. 1/4 W resistors shown for size comparison.

Other audio improvements: Icom HM-36 Chinese made microphone mods:

Replace the 22K resistor on the PCB of the mic with a 2.2K resistor which it should have been in  the first place. The Chinese made HM-36 mics have the wrong value installed.

Homemade loading coils - Same coil used on antenna above




1218170 Last modified: 2014-08-27 17:49:16, 6669 bytes

Login Required

Login is required for additional detail.

Apply for a new Vanity callsign...

You must be logged in to file a report on this page

Please login now...

Currently updating logbook display.
ad: giga-db
Copyright © 2014 by QRZ.COM
Wed Aug 27 19:09:01 2014 UTC
CPU: 0.051 sec 41637 bytes mp