[ARC5] Bandwidth for IF Transformers

[J Mcvey]

The ARC-5 manual page 60 has table 6-4 which has selectivity measured as a function of input .The R-24 at 2X "standard output" is listed as 1.1KHZ . I guess a weaker signal would be better but the worst case scenario at 1000X is 4.5KHZIt does not say if the rods are in or out, but I suppose it's in broad mode since most of the others are not adjustable and there is no asterisk.
Jim
 

    On Wednesday, March 16, 2016 6:12 PM, Bill Cromwell <wrcromwell at gmail.com> wrote:
 

 Hi Phillip,

The specs say the 85 kc cans are (depending on source) 2 kc, 1.5 kc or 1 
kc. I saw where somebody reported less than 1 kc. The 2 kc I found in 
one of the "official' manuals and 1.8 kc in yet another "official" 
manual. I suspect some of those are for a single can, a single can with 
a sweep tuneup, an entire I.F. strip peaked by ear, and an entire I.F. 
strip tuned up with a sweeper (aka wobbulator). I use them with the rods 
all the way up and peaked by ear. It was tough enough to get an 85 kc 
signal source and never mind a sweeper. I have no use for an I.F. strip 
that is opened up but they are supposed to pass AM phone with the rods 
down and aligned.

I have no 239 kc cans nor any radios that use them and so I have no 
recall of specs.

I hope this helps. I am sure others have data to add to this - for the 
239 kc cans especially. 85 kc wobbulator is on the to-do list. so some 
day...

73,

Bill  KU8H


On 03/16/2016 04:05 PM, Phillip Carpenter wrote:
> Has anyone measured the bandwidth passed for the 85kHz IFs and the 239kHz IFs with the rods pushed all the way in and then with the rods pulled all the way out?
>
> I'm curious as to how the two IFs compare as to bandpass relative to CW/SSB and AM/DSB.
>
> Thank you in advance to all who reply!
>
> Phillip W4RTX
>
> Sent from my iPhone
> ______________________________________________________________
>

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