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Circuit Board Construction Question Mar 23rd 2012, 13:10 4 1,817 on 15/9/13
10 Meter AM Nov 14th 2011, 19:24 4 2,005 on 14/12/11
Baofeng UV-3R Harmonic Fix Nov 11th 2011, 14:18 1 1,915 on 11/11/11
Novice Trivia Question: 10 meters Oct 26th 2011, 18:55 2 1,491 on 1/11/11
European AM'er Needs Help Aug 25th 2011, 19:45 3 1,439 on 23/11/11
How to Set the Temperature Setting On a Soldering Station Aug 16th 2011, 12:18 1 1,870 on 16/8/11
How to Remove Cigarette Smoke from a Newer Solid State Transceiver? Aug 8th 2011, 18:15 6 3,222 on 19/4/14
Switching Open Wire Feedline Bewtween a Transmitter and Receiver? Aug 8th 2011, 13:34 1 2,054 on 8/8/11

Latest Posts

Topic Author Posted On
Operating outside privilege bands WN6WJN 1 week, 5 days ago
T uses G's callsign, with G observing T's transmissions.
Stuff on 3840 W7WHY 2 weeks, 2 days ago
As I said on April 24th, "Those in position that can do something about it have been informed."

Bob Allison
ARRL Test Engineer
Collins 30L1 PY2ALR 3 weeks, 2 days ago
Collins supplied a specially designed RF interconnecting cable to use with the exciter of the 30L1; typically the KWM-1. This cable was special as it presented 50 ohms to the input circuits at all times.

Also, on another W8JI related topic regarding the 30L1, the AC power cord and transformer have wiring issues that are potentially dangerous. Collins made some serious errors wiring the power transformer. For safety sake, please read the information on the following link to make sure your 30L1 isn't wired in a dangerous manner:

Tuska 224 KG4AIP on 1/5/14
This is a single tube, AM Broadcast Band Receiver. You will need a six volt battery (or 6 V dc power supply) and 22 to 27 V dc to power the plate. The 9 volt batteries in series works good for that.

You will also need high impedance headphones (2K-3K Ohms), a good antenna and an good ground to make it work.

It uses a four pin 200 type tube, though a 201 type tube can also be used.
Rookie Roundup Results ka4sfd on 29/4/14
I was just informed by the acting Contest Manager that they were just posted:

Bob Allison
ARRL Test Engineer

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