[Boatanchors] B&W coils

[StephenTetorka at cs.com]

Mike:

Just what I needed...Mucho Graciano.
This helps me greatly.

I am going to try getting the PS + RF deck 'working' as best as is possible before I do the finishing touches in these sections.

Crawling before walking etc.

Right now, my objective is to get a 100 watt bulb to show some glow!

This is one heck of a great experience...like getting into the head of George, W2PLY back in 1948 and figuring out why the circuit is the way it is.

Those beat up old ARRL handbooks are very helpful but can't provide all the small but vital details like those you have provided.

Again, thanks,
Steve
WA2TAK

PS There's a heck of a lot more for me to do esp. with the modulator and control panel with all those heavy duty relays.
More inquiries to come, I'm sure.




"Mike Clarson" <mclarson at rcc.com> wrote:

>Steve: I have a little data. The MCL series are rated for up to 25 watts
>input stages, and the link is over the center of the coil, with 5 pin base.
>The JVL's have a link with a variable position, and are meant for stages up
>to 75 watts input. 5 Pin base also. Do not have the actual coil specs, but I
>am sure you could reverse engineer by seeing what size miniductor fits on
>the form that supplied the necessary inductance. 50's vintage Handbooks have
>this data. What is supplied in my catalog:
>
>80 MCL: 40 microH, 50 pf resonates it on low end of 80
>40 MCL: 14 microH, 35 pf for low end of 40
>20 NCL: 3.5 microH, 35 pf for low end of 20
>
>For the JVL series, no inductance is given, only the capacitance to resonate
>on the low end of the associated ham band.
>
>80 JVL: 46pf
>40 JVL: 31pf
>20 JVL: 21pf
>
>In 1953, the MCL's cost $1.26 and the JVL's cost $1.65
>
>
>
>-----Original Message-----
>StephenTetorka at cs.com
>Sent: Wednesday, January 05, 2005 9:48 AM
>To: boatanchors at mailman.qth.net
>Subject: [Boatanchors] B&W coils
>
>
>Hi all:
>
>Have some 'sad' B&W coils in my 1948 rack rig I'm restoring.
>
>The rig uses both the B&W "MCL" and B&W "JVL" plug in style.
>
>Might anyone have:
>1.  spec data on the 80, 40 and 20 meter units? for me to duplicate.
>2.  actual coils for sale?
>
>Tnx,
>Steve
>WA2TAK
>_
>
>