Welcome to the ham shack of W7CE


LINKS

NEW! - iPhone GPS/Maidenhead Grid Display

NEW! - Maidenhead Grid Distance Calculator

6M QSO Maps

2M EME Log

6M EME Log

August 2009 Grid Expedition to CO83, CO84, CO90, CO91 and DO05

August 2008 Grid Expedition to CN70, CN71, CN72, CN73, CN74 and CN81

My Tree-Tower and Antennas

W7JHS Website - AM headquarters for the Pacific Northwest

Amfone.net

Collins Collectors Association

University Christian Union at the University of Washington


August 2008 Grid Expedition to CN70, CN71, CN72, CN73, CN74 and CN81

 


Check out my three element 6M yagi design. It has a turning radius of only 48" and is designed for Rover operations or reduced space installations. The gain is only 1/4 dB less that of a full-sized three element yagi with equal or better F/R performance.

 


Most of my ham activity involves vintage equipment and AM phone operation. My primary operating position (Studio A) is shown above. It consists of a Johnson Ranger driving a Johnson Kilowatt Desk, a National HRO-60 receiver with 11 sets of coils (I need AA and AB to complete the set), and a Johnson Kilowatt Matchbox. I bought this complete station from Jim, W9CTO. My wife, Kathleen, and I made a 4500 mile round trip from our home in Lacey, WA to Highland, IN in 4-1/2 days to pick up this rig, and I had it on the air 12 hours after returning home (I slept a few of those hours). I feel quite fortunate to have located such a nice example of the Johnson Kilowatt. Before Jim, it was owned by Jeff, W0XV and the exterior was refinished by Robert, W0VMC.

For annennas, I use two 40M Double Extended Zepps. One is a horizontal flat-top at 110' high and the other is in a vertical vee configuration (an inverted vee stood up on end) with the top at 135'. Both antennas are center fed with ladder line and are used on 160M through 40M. I also have a Cushcraft A3 tri-band beam with the 40M dipole attachment that is mounted on top of a tree and is 90' high (see the link below for pictures).

When I'm at home (mostly weekends these days), you can find me operating AM on 3870KC in the late afternoon and on 1945KC in the evening.

73, Clay W7CE




My wife Kathleen and I drove to Billings, MT on Sunday, 11/21/04, to pick up the Collins 20V-2 1KW broadcast transmitter pictured below. This transmitter was in full-time broadcast service at radio station KOJM in Havre, MT until it was retired on August 4, 2004 and replaced with a new Harris solid state digital AM stereo transmitter. It was their only transmitter for the 45 years that they owned it. The 20V-2 has not been converted for ham use yet is still operational on 610KC. With a couple of small exceptions, everything is still original (the HV rectifier tubes have been converted to solid state, and a rheostat and extra meter have been added to control filament voltage to the 4-400's). I have powered it up into a dummy load in order to become familiar with it. Now I'm ready to begin the conversion process. I plan to initially convert it for 75M and may eventually set it up for use on 160 through 40M. I had hoped to have it ready for the Heavy Metal Rally on January 8-9, 2005. That isn't going to happen and I now hope to have it on 75M by the end of January.

On 11/18/06, Jim W0LU and I, along with our wives, drove to Billings to pick up more broadcast transmitters. Jim brought home a Gates BC-1H and I brought home another Collins 20V-2. Now I have two conversion projects pending.

Here's a picture from the rear with the doors open. You can see the 4-400 modulator tubes and the 4-400 final rf tubes. On the left is an extra "after-market" meter that displays filament voltage.



I bought the Collins 300G pictured below from Mike, W6THW, in Penryn, CA on 12/17/04. With the help of my brother-in-law and nephews, we moved it into my hamshack on Sunday 12/19. The 300G is a circa-1948 250 watt broadcast transmitter that uses a pair of 810's modulated by a pair of 810's. It weighs approximately 1370 pounds and stands 77" tall by 42" wide x 30" deep. The 300G is is a rare find. The highest serial number found to date is 171 and only about 17 of them are known to still exist. This is Serial No. 63.

This 300G was already converted to 160M and I had it back on the air on 12/22/04. I'm using an old Heathkit SG-8 signal generator as the vfo and have it working on 1945KC. The audio chain comprises a Behringer VX-2000 voice processor and an Electro-Voice N/D 357 microphone.

Here's a picture with the front door open. Below the coils are the two 810 finals and 810 modulators. On the bottom are the RF driver, two crystal oscillators and the audio driver.


NEW! - iPhone GPS/Maidenhead Grid Display

NEW! - Maidenhead Grid Distance Calculator

6M QSO Maps

2M EME Log

6M EME Log

My Tree-Tower and Antennas

W7JHS Website - AM headquarters for the Pacific Northwest

Amfone.net

Collins Collectors Association

University Christian Union at the University of Washington


Check out my other passion in life: Arts and Crafts/Craftsman architecture from the early 1900's, especially the work of Charles and Henry Greene.

Click Here for the Ultimate Bungalow Home Page


Copyright 2005-2009, Clay Curtiss, W7CE. All Rights Reserved.

Unless otherwise noted, all photographs Copyright 2005-2009, Clay Curtiss. All Rights Reserved.

Photographs may not be reproduced in any form without explicit written permission from the copyright owner.