[AMRadio] ART-13 Bottom Cover Needed

Subject says it all. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST

[AMRadio] Amphenol Coil Forms Wanted

I recently acquired an HBR-13C in stunning condition. The HBR-13C was described in QST magazine 1965, a 13 tube superhetrodyne receiver, that anyone with (and these are my words) 'above average skills' can build :) Its designer, Ted Crosby, achieved near cult status as a result of his HBR

[AMRadio] Vacuum Tube Digital Clock

Hi all, This is off topic, but a wonderful vacuum tube based clock is presented at the following link: http://tinyurl.com/g5s5b a labor of love not unlike what we do with our AM equipment. Regards, Jim JKO

[AMRadio] Johnson VFO mod

Need info on proven Johnson VFO Mods for Johnson 500 era . Change dropping resistor, installing zener diode instead of reg tube, etc Thanks Brad KB7FQR

[AMRadio] Question about ferrite rods

Hi all, Sorry for the newbie question, but I'm wondering how the directionality of a ferrite rod works. Basically, how do I point it to a source? Should the radio wave propagation direction be parallel or perpendicular to the ferrite rod? -- Conor www.TechPhreek.com

RE: [AMRadio] Vacuum Tube Digital Clock

Check this out: www.cathodecorner.com and click on the picture of the CRT unit (in the Plexiglass case). A CRT, vector-display clock. The 'guts' are solid-state, but the display is cool - plus the contruction time is quite a bit less. The Nixie Wristwatch is also fairly cool.

Re: [AMRadio] Question about ferrite rods

Hi Conor, A ferrite rod antenna should be perpendicular to the oncoming signal wavefront, and also perpendicular to its electrical field (or parallel to its magnetic field). Because you would ordinarily be close to the ground with a loopstick radio, signals will tend to be vertically polarized

Re: [AMRadio] Question about ferrite rods

Excellent! Thanks for all the info guys!

Re: [AMRadio] Question about ferrite rods

-Original Message- From: Bob Bruhns [EMAIL PROTECTED] snip Ferrite is useful up to the megahertz range, and some ferrites are even useful to UHF and beyond. My old Tandberg portable radio uses the ferrite up to 5 mhz then the telescoping vert. above that. Having a directional

[AMRadio] For Sale: Nixie Tube Digital World Clock

Hello, I have for sale a Data Time Special Edition Nixie Tube Digital World Clock. In good working condition. Looks great. $35.00. 73, Bruce WA8TNC

RE: [AMRadio] Amphenol Coil Forms Wanted

Hi Scott - Below is an email from Larry Baker, WB5OFD. He makes reproductions of those coil forms. 73, Mark W1EOF ~~ WB5OFD COIL FORMS These forms are modeled after the American Phenolic Company (APC) Polystyrene coil form

[AMRadio] Nixie Tube Clock is Sold

Hello, The clock is sold. 73, Bruce WA8TNC

[AMRadio] HRO knob update

Group, After much thought and fiddling around I finally had to surgically remove the outer bakelite knob. The three screws that held the knob on could not be coaxed out. This was an older model with only one set screw. Once I had that removed I was able to wedge out the knob with some shim

Re: [AMRadio] Question about ferrite rods

In a message dated 6/16/06 11:07:53 AM, [EMAIL PROTECTED] writes: I have often thought that a large remotely rotatable ferrite based loop on the roof or attic would be real nice for those difficult times. Bill, Give a small tunable loop a try. Dennis D. W7QHO Glendale, CA

[AMRadio] DRAKE L-4 Amp

Hi guys and gals,I need a replacement AGC pot/switch ,this is also known as ALC, it's a all in one pot / push-pull switch. I have been unable to locate a part number to cross-reference. The pot is 100 k with a push pull switch. Any help would be really appreciated... Thanks Bob W1PE