On 23 Jun, 04:48, "Ron Baker, Pluralitas!" wrote:
"Graham" wrote in message

ups.com...





On 22 Jun, 18:08, Graham wrote:
On 22 Jun, 16:26, Ratata wrote:

Graham wrote:
I can find what looks like construction project.. but is there a
working version anywhere ? or will the ham version take hf broadcast
signals ?

G ..

I've tried searching a dream.zip ...

it works.

I've tried it with a sw radio, no drm, I do not know how one can
receive drm
with eg a Sony 2001D, and no drm module, but it seems possible ...

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Ok...

Yes that worked .... seems to run , dident think of that ... the rx
has a 20 khz wide filter so should be able to take audio direct,

Tnx G ..- Hide quoted text -

- Show quoted text -

So much for that bright idea .nothing yet ....

.. the 12khz talked about , is that the center frequency of the
translate audio spectrum ???

so your supposed to present 0 to 20 / 24 khz to the sound card ????
and 12khz is 'the dial frequency' ???

Tnx

G..

You need to down convert the 12 kHz width of the
transmitted signal down to 0 to 12 kHz for input
to your sound card.

It won't work with the receiver in AM mode. An
AM detector destroys a drm signal.

SSB mode would work if the SSB receive bandwidth
were 12 kHz. I've never seen an SSB receiver with
12 kHz bandwidth other than the TenTec RX-320D
or similar SDRs. I don't know about Sony, Degan,
Sangean, etc. receivers but I doubt they can do it.

You might try with whatever SSB bandwidth you
have but I would be surprised if it works.- Hide quoted text -

- Show quoted text -


Ok , thanks for the info,

Im using a racal ra6790gm , which has 20 Khz wide filter, I can set
the bf o up to + - 8 Khz from center frequeny .. so if the signal is a
'12khz block' then setting cw, pass band 20 khz the bfo at either +6
or -6 Khz , that should produce the 12 khz down conversion ? , the
audio bandwith is a littlw over 11 khz , looking of spectrumlab , so
it should handle the signal as 'audio'

I assume the published frequency is the 'center frequency' so setting
the dial at that and the bfo offset to 6 khz , should produce the
correct spectrum ?

Rgds

G ..