Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Vintage TV & Radio Tech Forum

Notices

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 05-20-2021, 02:29 PM
DavGoodlin's Avatar
DavGoodlin DavGoodlin is offline
Motorola Minion
 
Join Date: Aug 2011
Location: near Strasburg PA
Posts: 3,500
Modulators are great ways to enjoy your sets. The reasonably priced ones are Blonder-tongue BAVM Z series https://www.ebay.com/itm/30354393616...Cclp%3A2047675, but need to be on a channel that both your TV receives and one not being used in your area.
The ones in that link you may consider are the channel 3 or 9, NOT channels 28 and 36, which are not UHF but cable super band. Connect a DT box, DVD, VCR to composite A-V inputs. On the output, a single wire is enough antenna to broadcast all over the house with any TV needing only a set of rabbit ears.

I have a superband BAVM that was a cable channel but ALSO corresponds to UHF-45, which is perfect for my sets with UHF. I also b-cast 3-7-11 which are not active in this area, from my outbuilding that has the video sources, rack mounted modulators and antennas for each channel up in a loft. The reception in the house is good but requires adjusting the antenna to reduce snow just like analog days. Way more than if I was using a TV in that same outbuilding.
__________________
"When resistors increase in value, they're worthless"
-Dave G

Last edited by DavGoodlin; 05-20-2021 at 02:43 PM.
Reply With Quote
  #2  
Old 05-20-2021, 03:43 PM
zeno's Avatar
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 4,918
Without seeing your set or schematic I would guess.......
The AM radio uses an internal ferrite loop stick antenna. Just like
almost all AM radios. Sometimes they provide an input for a
random length wire.
FM starts just above Ch 6. On most sets you can fine tune the TV
& start getting FM.
To my knowledge olden days antennas were not designed to reject FM
so everything can come in together. Newer antennas, at least the
Jerrolds I used had break off elements to reject FM. This was done
to better get Ch6 if it were fringe.
Bottom line is use a 75 to 300 ohm adapter to hook up FM & TV.
Be sure its rated to pass up to 800 MHZ.
For AM to add an external ant is involved You would have to couple
it to the loopstick by adding a winding. Hope that all helps.

73 Zeno
LFOD !
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 04:33 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.