[Heathkit] help needed

Edward B Richards zuu6k at juno.com
Sat Dec 15 16:19:07 EST 2007


Thank you. I received a number of responses suggesting cable TV splitters
which I know are for RF not audio or video. No one answered my question.
Maybe I phrased it wrong. All I want is the value of  the resistors in an
unbalanced, resistive 2-way splitter, mixer, combiner or whatever you
want to call it. Thank you.

Ed  K6UUZ
  
On Sat, 15 Dec 2007 14:37:36 -0600 (CST) "Jim Shorney"
<jshorney at inebraska.com> writes:
> On Sun, 16 Dec 2007 01:50:37 -0600, Revcom wrote:
> 
> >Plain ole' cable TV splitters, cheap ones, use adapters to get to
> >BNC/RCA or whatever. RadioShack as well as many sources have
> >them.
> 
> I'm skeptical of this approach. I'm not saying that it doesn't work, 
> but it
> doesn't follow intuitively. The OP's wording suggests that he is 
> looking for
> a solution for composite video, not video modulated RF. What you are 
> talking
> about sounds like RF splitters.
> 
> I haven't seen resistive TV splitters since the 300-ohm twinlead 
> days. All of
> the 75-ohm splitters I've cracked open are inductive, with 
> broadband
> transformers inside to do the work. These are designed for RF from 
> low VHF
> up, and most of the energy in composite video is below about 6 MHz. 
> I would
> be concerned that the RF splitters don't have the low-frequency 
> response to
> do the job properly.
> 
> 
> --
> Ham Radio NU0C
> TR7/RV7, TR6/RV6, T4XC/R4C, L4B, NCL2000, SB104A, R390A, 
> GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time!
> 
> HyGain 3750 User's Group - 
> http://groups.yahoo.com/group/HyGain_3750/
> 
> 
> 
 


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