Radio Road

RE: signal balance question

75.166.186.141

walkstoslow

In Reply to: RE: signal balance question posted by HoosierAudio on April 19, 2020 at 09:51:38

HA
Switching to mono did not make a difference,
does this mean the problem is in my tuner?
thanks, I am displaced hoosier.

Follow Ups:

RE: signal balance question - HoosierAudio 18:12:32 04/19/20 (3)
WTS,
Have you checked the simple things first?
The interconnect between the tuner and preamp. Pull the IC and reinsert a couple of times, see if that clears it, if NOT
swap the IC L & R wires and see if the problem follows the IC.

Have you cycled all the switches on the tuner?

That unit is pretty straight forward internally. It goes from the HA1196 IC to the RCA's with no intervening buffer. I'd be surprised if its the IC, but its possible.

Post back with what you find and we''ll continue to troubleshoot.

HA
- RE: signal balance question - walkstoslow 16:29:29 04/20/20 (0)
  Ha
  So I have discovered that fm is equivalent to channels 6-7VHF should be ok?
- RE: signal balance question - walkstoslow 14:19:10 04/20/20 (0)
  HA
  I am in the process of checking the IC's.
  I noticed that the antenna terminals are both, 75 ohm and 300ohm.
  My antenna has a coax output which I am assuming is 75 ohm.
  I am using a RCA TV-Matching Transformer VH54, with 300 ohm leads.
  I have that connected to the 300 ohm FM inputs on the tuner.
  Is this the correct transformer? From High school back in the 60"s,
  I installed tv antennas for a local repair shop. I remember we would
  use an "FM Trap" sometimes, is that what this transformer actually is?
  I can not seem to get a good resistance reading from it.
  I am getting a strong signal according to the tuner meters, with the 300 ohm connection.
  I see by the users manual that the 75 ohm terminal uses a bare coaxial connection, lead wire and ground braid only.
  My Coaxial cable is a Monster cable, gold plated coax connectors at both ends.
  I don't really want to snip one connector and try the bare 75 ohm connection unless you think this might be worthwhile.
  I am checking the IC also.
  thanks
  
  Edits: 04/20/20 04/20/20
- RE: signal balance question - walkstoslow 19:45:01 04/19/20 (0)
  ha
  I will do all of this tomorrow and report back
  thanks for your help

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