DFB Button on Superstar SS 3900

[Wire Weasel]

This is the rig with black face and gold trim. Has array of 6 buttons. Top left hand button says "DFB" over "ON" Friend has this radio, no manual, and can't figure out what function this is. Anybody know?

Many thanks!

WW

 

[jazzsinger]

This is the rig with black face and gold trim. Has array of 6 buttons. Top left hand button says "DFB" over "ON" Friend has this radio, no manual, and can't figure out what function this is. Anybody know?

Many thanks!

WW

Check out that link,I'm pretty sure that's what its for,but haven't been able to pull one of those radios apart to double check:
http://www.worldwidedx.com/meters-m...rland-citizens-band-radio-radio-products.html

If you have one there you could maybe look for that board number in the radio and confirm it.Ithink it stands for double/dual filtre de bande,I may be wrong.

 

[Wire Weasel]

Thanks Jazzy. I'll have the friend put it on CW and work the button and see if changes the receive tone. That will apparently make it a CW filter.

Gonna be there Friday to do some antenna work for him

 

[Beetle]

Don't think it should change the pitch of the received CW note, but it might well change the bandwidth. Probably narrow it to exclude nearby signals. If the radio has RIT, this would be a good place to try it out.

 

[steelemonky 175]

Don't think it should change the pitch of the received CW note, but it might well change the bandwidth. Probably narrow it to exclude nearby signals. If the radio has RIT, this would be a good place to try it out.

These Radios do not have CW on them.

 

[TM86]

"These Radios do not have CW on them."

Aside from the fact you're responding to a 13 year old thread, it could be made to work like it did. Set the mode to AM or FM, turn down the mic gain, and use the PTT like a code key. Switch it to LSB or USB for receive and you're all set. Yes, it's a PITA, but it could work.