[Heathkit] help needed

[Revcom]

The key is "cheap" splitters, they are usually just resistive.
Check them first with ohm meter.

----- Original Message -----
From: "Jim Shorney" <jshorney at inebraska.com>
To: <heathkit at mailman.qth.net>
Sent: Saturday, December 15, 2007 2:37 PM
Subject: Re: [Heathkit] help needed


> 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/
>
>