Comparing Output Distribution on Mixers EMS-500 and EMS-505 - Manufacturer Info?

Hey!

Looking for the distribution of the mixer outputs EMS-500 and EMS-505. I do not even know who their producer is (on the EMS-505 there are also EC letters). Thank you in advance for your help

pozdr
Jack

EMS-500 is equivalent to SBL-1
http://www.webx.dk/oz2cpu/20m/mixer.htm
and it has the same derivation. As for EMS-505 so far I can not help.

Hey!

Thank you for your response. Visually, the EMS-500 differs from SBL1 in that it has 2,5,6,7 knives attached immediately to the housing. Out of curiosity, I removed the housing from the EMS-505 and the distribution of output is the same as SBL1 in the picture from the page you gave me.

I am asking about the distribution of outputs because I want the EMS-500 to be applied to the SP5WW board (from 1986). It's just that the author has connected the self-made mixer balanced a little differently than it would result from the description eg SBL1 or pin8 to VFO, pins 3 and 4 to the quartz filter and on pin 1 the output / RF input. And on the SP5WW board (as if pin3 and 4 mixer) it goes VFO, from the same transformer (pin 1 or RF) it goes to the quartz filter and from the second transformer (pin1 or LO) the output / RF input. I do not understand why?! Is it because the mixer is to work with unchanged connections both on reception and broadcasting ?! hmmm

greetings
Jack

I admit that I do not associate this solution. If you would like to place a drawing or better give a link, I'd be happy to know this solution.

Hi!

This is an article from RE 8/86. It's nice that there are electrodes in the archives. Here's the link

http://archiwa.elektroda.net/indexa.php?path=./86r/08/&page=1 " target="_blank" class="postlink inline" title="" > http://archiwa.elektroda.net/indexa.php?path=./86r/08/&page=1

Pages 12-14. The most interesting, that it works I wonder if using a factory mixer balanced it should be connected according to the author's idea or, as recommended by the producer and the parties, switch over with
I am also wondering whether the PP9A2 quartz filter is symmetrical or has an input and output ??

pozdr
Jack

As for PP9A2, it is clear from the internal scheme that it is symmetrical, therefore there should be no difference what is the input and which output, page 297.
As for the mixer, it can be connected in a variety of ways. I will not elaborate here on this subject, because it is exactly described in the book entitled "Bachkowski's ultrashort radio guide"
http://winntbg.bg.agh.edu.pl/skrypty2/0067/main.html
page 552 and next.
Thanks for the link, as I read this article, maybe some observations will come to me, I will share them.

Hello

Where can I buy such mixers:

SN16913
EMS500X19320 -20dB ??

Does anyone know any online store?


NOT this section.
Regulations pt. 8.3 . [SP5ANJ]