Thread: 91 XG Modified
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Old 12-Jun-2020, 2:40 PM   #14
tripelo
Senior Member
 
Join Date: Jan 2010
Location: Dallas, TX
Posts: 173
Good morning Sev.

Quote:
Originally Posted by Sev View Post

...I recently came into a NOS Channel Master Spartan 3 0064DSB with the 300 Ohm input.
I am hoping this will allow me to forgo the need for the beads and coax as the output on the Spartan is 75 Ohm.
The CM 0064DSB has a regular ferrite 300:75 Ohm balun at its input.

The core and windings are seen in the lower right of this image (near input terminals).






Could be CM used a slightly better core than used in most commercial baluns. However, the balun has loss.

Removed the core and windings, replaced with half-wave loop saw signal about 1-2 dB strength improvement.

.


No offense Sev, the post was quick and for a while was thinking about Bob's earlier posts.
Attached Images
File Type: jpg CM-0064 Circuit Components.jpg (44.7 KB, 3822 views)

Last edited by tripelo; 12-Jun-2020 at 3:07 PM. Reason: Good morning Sev, and Bob
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