EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Folks - I have recently added a folder in the Archive, under Set Folders, you will now find Accessories. Take a look!

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Comment by David C. Poland on October 8, 2018 at 8:02pm

An interesting exercise to construct one.

Opinion - If you are chasing DXing performance with maximum sensitivity and reduced background noise, or seeking best possible sound from a good nearby music station, probably be beneficial.

But a single long wire of 60 feet or so including lead -in should work well too. There is another thread on this site where someone used coax lead-in for sake of avoiding picking up interference from lead-in.

With a single wire lead-in, connect the ground post to the nearer antenna of the radio.

Comment by Robert Feenstra on October 6, 2018 at 11:10pm

Thanks David.  So, bottom line, is it worth the effort?  Or, is a long wire (which I already have) close enough in performance that I wouldn't notice that much difference?  I don't want to do a ton of work only to be disappointed!

Comment by David C. Poland on October 6, 2018 at 9:56pm

Robert - The figure 4 would the figure 9 (typo) for the first version having 29 foot flat tops. and 110 foot lead-in. For a later model  Scotts with two antenna terminals,  I doubt any external coupler should be used.

See Scott News Sept 1936 for the Murray Clay (Scott engineer) article on the Scott's new internal coupler designed to eliminate any interference picked up by the lead-in, beginning with the late AW-23 with two antenna posts. Now this new Scott Super Antenna has four 24 1/2 foot lengths and lead-in lengths are not critical. There is a diagram of the filter attached to the outdoor junction. Have no idea of the exact values of the coils inside. I see Kent has not yet added this antenna piece it to the new Accessories folder.

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About 25 years ago, I made a repo of the Scott Super Antenna as per the mid 1930's dimension and hung it outside. Used it on my Philharmonic without a coupler, as the Philharmonic had 2 antenna posts.  Seemed to work well enough, but, of course lacked the real version  for comparison. 

Used two of the Radio Shack 70 foot long wire antennas kits. Cut each long wire to about 47 feet (29+16 1/2 plus 1 ft extra to loop through insulators).  These two wires cross each other at in insulated junction without touching. Also two 110 lengths of insulated multi-strand wire twisted together for the 110 foot lead-in. Made the antenna junction piece from a small block of wood dipped in hot wax as a preservative. Installed this antenna in the back yard. For those of you with the Scott News issues published by the now inactive E H Scott Historical Society - see my article: Vol 6 No 4 December 1997.

When we moved, then I had room to rig  this antenna in the attic over the condo and garage. At about 50 foot from the antenna center point, I cut the twisted lead in, in order to insert a 6 way double pole rotary band switch. Had to make up a few 60 foot twisted lengths to provide the total 110 foot lead-in to each radio  This allowed me to direct the signal to any of the 4  Scotts I had having two antenna terminals, with the remaining 4 lead in wires to four other radios with a single antenna post.

T

Comment by Robert Feenstra on October 5, 2018 at 12:24pm

David, your second comment came in as I was typing the response.  So, some sort of coupler would be necessary to properly match up the antenna to the radio.  Perhaps there are other sources of info on similar antennas that could give a hint as to what matching transformer is necessary. Or, someone who has a lot of antenna theory under his belt could shed light on the subject.

Comment by Robert Feenstra on October 5, 2018 at 12:19pm

Thanks David.  So I presume I could use this antenna on the Scott 16 without any coupler at all.  It would seem to me that this antenna is somewhat directional.  True?

Comment by David C. Poland on October 5, 2018 at 12:17pm

The outboard coupler hung off the tube shield has a coil of wires inside, but I know of no diagram.

The next version Scott Super Antenna after late 1936 had a device hung at the junction where the 4 wires come together outside, ahead of the twin lead in. I suppose this rectangular box had some kind of coil and maybe a cap inside.  I know of no circuit diagram. The post war version appears very similar.

Comment by David C. Poland on October 5, 2018 at 12:08pm

Regarding the round chrome plated outboard antenna coupler circa 1934-36, oft seen hung off the middle tube shield on the receiver back. Initially, had a toggle switch then soon a 2 position switch with wood knob. Couple was supplied with the antenna.

This coupler was for the earlier double dipole wire antenna with 110 foot twin wire twisted lead in for mid 1930's Scotts having a single black antenna post - the AW-15, AW-23 5-knob and earlier production AW-23 7-knob (until the second black antenna post was added about August 1936).

The outboard antenna coupler has a 2 position switch - BROADCAST for the broadcast and low SW band. And SHORTWAVE for the two higher frequency bands. In the SW position, broadcast band gets very poor reception!!

I suppose it could be used on the earlier AW-12 and 2-Dial, although most AW-12's had another type outboard antenna tuner for a single long wire antenna.

Subsequent Scotts after Fall 1936 had 2 antenna posts (or screw terminals) and the switch became part of the band switch function.

Comment by Robert Feenstra on October 5, 2018 at 11:06am

Setting up the antenna is no problem.  They talk about some sort of coupler between the antenna lead in wires and the antenna terminals on the radio.  I assume it is some sort of matching transformer.  The articles refer to a figure 4 which does not exist.  Instead, figure 9 show the coupler with a switch in the middle.  I was wondering if there is a schematic of this coupler.

Comment by Kent King on October 5, 2018 at 7:02am

A couple of the Scott antenna manuals are in there, those describe how to build/set up the recommended antenna. If that doesn't cover what you need, let me know and I'll see if I have anything else. I have a lot of material I should scan in, just don't have time :-(

Comment by Robert Feenstra on October 4, 2018 at 9:04pm

Excellent.  Is there info on the antenna coupler that connects the Super Antenna to the radio?  I may have room to set up such an antenna.

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