Model 65 Hiboy - Printable Version

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+--- Thread: Model 65 Hiboy (/showthread.php?tid=12677)

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Model 65 Hiboy - Bob L. - 07-06-2015

Hi All

I am new to the group. I acquired a mod 65 highboy that I am trying to restore but it has some items in the chassis that do not match the Ryder schematic I have. I found a bad ant primary coil that I will rewind but this coil looks to have a center tap and a switch. The schematic shows a 5K resistor to gnd.
I was wondering if any of you experts would enlighten me if someone had run across this before
any help would be greatly appreciated.

Bob L.

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Model 65 Hiboy - klondike98 - 07-06-2015

Hi bob, welcome to the Phorum!!!  .

Moved your post to this new thread in Electronic Restoration.  It would disappear in the other section after awhile.

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RE: Model 65 Hiboy - Radioroslyn - 07-06-2015

Hi Bob and Welcome,
Don't see a ct either on the ant coil. A tap and a switch could be used a a local/distance set up.

Terry

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RE: Model 65 Hiboy - Ron Ramirez - 07-07-2015

http://www.philcoradio.com/tech/images/65.jpg

This schematic shows a tap in the antenna coil primary and a local-distance switch, part (32).

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RE: Model 65 Hiboy - Bob L. - 07-08-2015

(07-07-2015, 05:13 AM)Ron Ramirez Wrote:  http://www.philcoradio.com/tech/images/65.jpg

This schematic shows a tap in the antenna coil primary and a local-distance switch, part (32).

Thank you for the info and schematic one more question the location of the volume control I must be blind can't see it on the schematic.





i also have 2 more consoles and 2 table tops.
Thanks for the help

Bob L.

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RE: Model 65 Hiboy - klondike98 - 07-08-2015

I believe its here:
[Image: https://dl.dropboxusercontent.com/u/54621529/65_volume.jpg]

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RE: Model 65 Hiboy - Radioroslyn - 07-09-2015

Bob,
Yes that is the volume control.

Bob L,
How it works is it varies the screen grid voltage on the two RF amp tubes. The lower the screen grid voltage the lower the gain of the tube hence the lower the volume and vise virsa.

Terry

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