[sdiy] passive ring modulator transformers

[Magnus Danielson]

In another context, we concluded that there seems to be around 30 dB 
better S/N possible with diode mixers compared to the Gilbert-cell mixer 
of MC1496 and similar. This comes from the fact that you must reduce the 
signal amplitude to maximum 25 mV peak for the MC1496. It also matched 
the experience of experienced designers.

While the experience was in the RF field, basic properties should 
translate down to audio frequencies.

Cheers,
Magnus

On 01/17/2016 03:58 PM, Rick Jansen wrote:
> Sorry, the mc1496 was used, not the mc1494.
>
> I wonder if a transformer based circuit will work well. It was all they
> had before electronics, but not everything old is better, or even good..
>
> rick
>
> On 17/01/2016 14:55, Simon Brouwer wrote:
>> Hi,
>> Does the MC1494 have any important advantages compared to the MC1496?
>> It looks difficult
>> to get.
>> Best regards
>> Simon
>>
>>  > Op 17 januari 2016 om 14:28 schreef Rick Jansen
>> <rick.jansen at xs4all.nl>:
>>  >
>>  >
>>  > In that case the old mc1494 is a candidate too. Elektor's ring
>> modulator is built with it.
>>  >
>>  > http://www.onsemi.com/pub_link/Collateral/MC1494-D.PDF
>>  >
>>  > Rick
>>  >
>>  > > On 17 Jan 2016, at 14:14, Gordonjcp <gordonjcp at gjcp.net> wrote:
>>  > >
>>  > >> On Sat, Jan 16, 2016 at 05:26:11PM -0500, alfred.pear at gmail.com
>> wrote:
>>  > >> hello SDIYers,
>>  > >>
>>  > >> i'm currently trying to figure out how to get reasonably affordable
>>  > >> transformers for a passive ring modulator.
>>  > >
>>  > > Why not just make a proper four-quadrant multiplier out of a
>> couple of opamps and an
>> LM13700?
>>  > >
>>  > > --
>>  > > Gordonjcp MM0YEQ
>>  > >
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