123

The Old CATV Equipment Museum
CATV Off-Air Signal Reception

Tower-mounted passive devices

CONTENTS OF THIS PAGE
Blonder Tongue Model MB 300-ohm to 75-ohm Balun
Blonder Tongue Model MB-b 300-ohm to 75-ohm Balun
Blonder Tongue Model MWT-2B Notch Filter
Channel Master Model 7200 300-ohm 75-ohm Balun
Jerrold Model UMN-3 Channel 14-83 Mixing/Splitting Network
Jerrold Model 300TT-20 300-ohm Channel Trap
Jerrold Model 75TT20-10 75-ohm Channel Trap
Jerrold Model YC-300-7 Single-channel PassBand Reject Filter
Jerrold Model YC-75-9 Single-channel PassBand Reject Filter
Tricraft Model 114-061 UHF-VHF Isolating Network
Winegard VHF/UHF Antenna Signal Preamplifier


Blonder Tongue Model MB
300-ohm to 75-ohm Balun

Note the PL-259 output connector

Photo: Lew Chandler

 
Photos: Lew Chandler

Blonder Tongue Model MB-b
300-ohm to 75-ohm Balun

Note the BNC output connector

Photo: Lew Chandler

 
Photos: Lew Chandler

Blonder Tongue Model MWT-2B
Notch Filter

Photo: Lew Chandler

Photo: Lew Chandler

 
Photos: Lew Chandler

Channel Master Model 7200
300-ohm 75-ohm Balun

Photo: Lew Chandler

 
Photos: Lew Chandler

Jerrold Model 300TT-20
300-ohm Channel Trap

Photo: Lew Chandler

 
Photos: Lew Chandler

Jerrold Model 75TT20-10
75-ohm Channel Trap

Photo: Lew Chandler

 
Photos: Lew Chandler

Jerrold Model UMN-3
Channel 14-83 Mixing/Splitting Network


Strictly speaking, this is a combining network, not a mixing network.   A mixing network is a nonlinear circuit designed to accept two input frequencies and generate additional frequencies equal to the sum and/or difference of the input frequencies (reference).   By contrast, a combining network is a linear circuit designed to combine two (or more) frequencies without generating byproducts.

Photo: Lew Chandler

Photo: Lew Chandler

 
Photos: Lew Chandler

Jerrold Model YC-300-7
Single-channel PassBand Reject Filter

This particular filter is rejects Channel 7.
Jerrold also manufactured filters for other channels.

Photo: Lew Chandler

 
Photos: Lew Chandler

Jerrold Model YC-75-9
Single-channel PassBand Reject Filter

This particular filter is rejects Channel 9..
Jerrold also manufactured filters for other channels.

Photo: Lew Chandler

 
Photos: Lew Chandler

Tricraft Model 114-061 UHF-VHF Isolating Network

Photo: Lew Chandler

Photo: Lew Chandler


Winegard VHF/UHF Antenna Signal Preamplifier

 
Photos: Neal McLain

 
Photos: Neal McLain



  Top     Back     Home