[Premium-Rx] FS: HF RECEIVER MULTICOUPLER (FROM DRAKE7-LINESTATION)

[Michael O'Beirne]

Dear Chas

Thanks for your email.  I don't know that particular balun or have access to 
the Hatfield data sheet and so can't help much.  As a guide, the plate on my 
Type 3151 hybrid (50 ohms), in pristine condition, states that it covers 
0.5 - 50MHz.  It is 1 in and 2 out.  The serial number is B.2852.

>From this I suspect you may perhaps have swopped the serial number for the 
type number because your Type number is very close to mine - 3156.

I also suspect that making more ports is more complex and critical and that 
the frequency range spread will decrease as the number of output ports 
increases.

I also have an older Hatfield wideband matching unit built into the the same 
size of case but the case is unpainted (not the usual blue hammer finish of 
the newer products).  It is 75ohms in (unbalanced) and 600 ohms out 
(balanced).  The plate says it covers 200kHz - 100MHz.  The type number is 
AT F40F.  The type number thus appears to bear no relation to the frequency 
coverage.

My end guess is that your balun's range is probably similar to mine.

BTW I measured the frequency specs of one of my Mini-Circuits baluns and it 
was quite a lot better than the specs in the catalogue.  I can't speak for 
the Hatfield balun.

I hope this helps
Michael
G8MOB

----- Original Message ----- 
From: "Chas" <chas.g1rsk at ntlworld.com>
To: "Michael O'Beirne" <michaelob666 at ntlworld.com>
Sent: Tuesday, April 24, 2012 4:05 PM
Subject: Re: [Premium-Rx] FS: HF RECEIVER MULTICOUPLER (FROM 
DRAKE7-LINESTATION)


> Hello michael.
> A bit of advice please. I have a small Hatfield hybrid combiner 1 in 4 
> out. I have not been able to find any details on this device....the only 
> markings are DC290 follwed by presumably a serial number 3156.
> Could one presume that it is DC to 29 mhz or 290 mhz??
> Thanks. Regards Chas.