Archive for December, 2020

Coil Improvements – Pastime Projects 6V6MC Transmitter Kit

December 20, 2020

The 6V6 MC (Metal Chassis) coil consists of an octal base coil form. The kit builder winds the coil for 80 or 40 meter ham band operation. It includes a second winding which matches 50 ohms load. (Your antenna system.) It is difficult to wind, count, strip and draw the coil wires down into the proper pins in the bottom of the coil base. Since the coil form consists of a base which is edge glued to a plastic tube, the joint can be somewhat fragile. Instructions are included with each coil on how to re-glue.

In order to make the tube coil form a little stronger, we came up with some large heat shrink material to support the joint. The assembled coils will include this heat shrink ‘belt’ for added strength.

We hope you appreciate this change. Perhaps it will help you through the coil winding procedure with a little less frustration. Best regards, Glenn Brown for Pastime Projects.

Pastime Projects 6V6 MC (Metal Chassis)

December 18, 2020

The Pastime Projects ( 6V6 MC Ham Transmitter Kit was introduced some time ago as a newer design to the 6V6 RW (Remember When) ‘slat board’ Kit which is a reproduction of ARRL’s design from the late 1940’s. The 6V6 MC uses a different type of crystal oscillator and a much improved chassis.

Recently a fellow amateur asked if he could buy the kit less the metal chassis, because he wanted to use his own chassis (I suspect a pie pan?) . Yes! He purchased – and built – his own interpretation of what he had as a new ham back in the 1960’s. The detailed instruction manual was supplied along with other parts but just less the metal chassis we normally supply.

Because of the cost of the metal chassis, and the machine shop fabrication of the chassis to our specifications he saved around $30.00 in cost of the kit.. (Have you priced machine shop costs lately?)

We offer this option… See our web page.. If you dont see it, send us a “Contact Us” message as seen in the web pages. We will fill in the details.

We have noticed some other things about the 6V6 MC Kit: The coil form has been strengthened by adding a large diameter heat shrink band around the junction of the base and coil form itself. Crystals seem to hold up better and produce more output in the 40 meter version. They also don’t seem to destroy themselves quite as much as some of them did in the 80 meter version. There is some question of the link coupling used on the 80 meter version. It may be capable of more output. We are checking further; meanwhile our friend overcame this problem by using an antenna tuner on 80 meters.

Always more to check… Very best regards Glenn Brown for Pastime Projects.