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Problem with Kens Ring Modulator

2007-10-08 by Richard

Hi,

I recently received Kens ring modulator board. While it works/sounds
fine, I noticed that I have some bass frequency loss. Even when using
a very low carrier frequency, say 10 Hz or lower (ie essentially
amplitude modulation) it is clearly audible compared to the dry
signal. Now I'm very new to this. I'm using a case with 3 mono jacks
attached to it and 6 small wires to connect them to the board. My
question is, is a minor bass frequency loss normal in passive ring
modulators? If not, how can I determine the cause?

Best Regards,
Richard

Re: Problem with Kens Ring Modulator

2007-10-09 by Richard Hoffmann

--- Andre Majorel <aym-htnys@...> wrote:

Show quoted textHide quoted text

> I think that's to be expected. Transformers are
> inherently AC
> devices. They can't pass very low frequencies.

OK, I did a test using a MOUSER Tm018 1:1 transformer
(connecting cables directly to both sides), and indeed
there is a bass loss. However, it is fairly subtle,
about 1 dB down at 30 Hz. Is it possible the
particular combination of 4 diodes and 2 transformers
causes this? When I build a passive ring mod with 2
mouser transformers, the bass loss was huge, the
signal was down at least 10-20 dB at low frequencies
(I didn't measure exactly). With Kens ring mod, it is
a lot better than with the mouser transformers, but
the effect is still there. Can the diodes cause the
bass loss?

Rich

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Re: Problem with Kens Ring Modulator

2007-10-09 by sasami@hotkey.net.au

I would expect the losses to be in the transformer core - in how far you can
magnetise them. Something you can try is to feed the lower of your two
frequencies into the carrier (center) connection. The carrier input will
work right down to DC as there is no transformer involved.

Ken

Show quoted textHide quoted text

>--- Andre Majorel <aym-htnys@...> wrote:
>> I think that's to be expected. Transformers are
>> inherently AC
>> devices. They can't pass very low frequencies.
>
>OK, I did a test using a MOUSER Tm018 1:1 transformer
>(connecting cables directly to both sides), and indeed
>there is a bass loss. However, it is fairly subtle,
>about 1 dB down at 30 Hz. Is it possible the
>particular combination of 4 diodes and 2 transformers
>causes this? When I build a passive ring mod with 2
>mouser transformers, the bass loss was huge, the
>signal was down at least 10-20 dB at low frequencies
>(I didn't measure exactly). With Kens ring mod, it is
>a lot better than with the mouser transformers, but
>the effect is still there. Can the diodes cause the
>bass loss?
>
>Rich
>
>
>
>
>___________________________________________________________________________

_________

>Be a better Heartthrob. Get better relationship answers from someone who

knows. Yahoo! Answers - Check it out.

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>
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>
>Yahoo! Groups Links
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@...
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Problem with Kens Ring Modulator

Problem with Kens Ring Modulator

Re: Problem with Kens Ring Modulator

Re: Problem with Kens Ring Modulator

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