[Heathkit] help needed

[jeremy-ca]

Velly simple.

In the basic 2 port Wye splitter you have 3 equal value resistors 1/3 the 
source impedance. This holds for any impedance.

Just remember that you have a 6dB + splitter loss and not 3dB as in the 
"lossless" splitter.

Carl
KM1H


----- Original Message ----- 
From: "Edward B Richards" <zuu6k at juno.com>
To: <jshorney at inebraska.com>
Cc: <heathkit at mailman.qth.net>
Sent: Saturday, December 15, 2007 4:19 PM
Subject: Re: [Heathkit] help needed


> 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/
>>
>>
>>
>
>