--- In [email protected], Alberto I2PHD <[EMAIL PROTECTED]> wrote:
>
> v2x2002 wrote:
> > Greetings
> >
> > My IQ DRM Decoder for Dream
> >
> > It's hart ( 2 x EL86 ) born from long modification of SO's and
Regen's
> >
> >
http://www.smail.lt/~ncss/regen_info/MyIQDRM_Decoder_for_Dream_2006020
9.jpg
> >
> >
> > Comments in future ...
> >
> >
> > Best regards;
> >
> > Saulius.
>
>
> Well Saulius,
>
> what can I say... congratulations for your original and "out of
the schemes"
> project. Frankly, this is the first time I see tubes and ICs used
together in
> the same circuit. The 545 series of Tektronix oscilloscopes used a
mixed technology,
> tubes and transistors, but I don't know if they had also ICs in it.
>
> It would be interesting if you could take a few pictures of your
realization, and
> upload them to the Photos section of the group.
>
> 73 Alberto I2PHD
>
Thank you very much Alberto
Greetings
Excuse me I make mistake:
My IQ DRM Decoder for Dream bases on 2 x EF86 valves
http://www.jogis-roehrenbude.de/Roehren-
Geschichtliches/Ef86/EF86_SV.pdf
or old russian 6Z32P
http://tubedata.tigahost.com/tubedata/sheets/112/6/6Z32P.pdf
- valves 2 x EL86 I use in regenerative - autodyne receiver
Yesterday I approximately measure symetric sideband suppression
with Dream Input Psd screen:
A: Conditions:
80m Delta Loop H1 = 12m, corners h2 and h3 about 2 ... 3 m
DW3995Khz + Sony ICF7600G + My IQ DRM decoder on 2xEF86
frequency converting to 14 khz +
Creative USB Soudblaster Mp3 audio line one Input 0
start Dream.exe --sampleoff -11.7 -c 0 -E 14000 -S 11000
Sony's frequency display set to 4000Khz or 4028khz
Antena input suppression set to 0 db by Sony's atteniuator
One audio input Results in files:
http://www.smail.lt/~ncss/regen_info/3995_Sony4000+0dbAtt_To14khz.jpg
http://www.smail.lt/~ncss/regen_info/3995_Sony4028+0dbAtt_To14khz.jpg
No Sony's signal
http://www.smail.lt/~ncss/regen_info/SonyTurnOff_To14khz.jpg
A. Conclusion:
In this case I think that
symetric sideband compensation inside decoder
20 ... 30 db
form from
total supression by LC and Costas IQ phases summarizing
(not by Dream)
B: Conditions:
audio line Input 0 and line Input1
start Dream.exe --sampleoff -11.7 -c 3 -E 14000 -S 11000
Two IQ input Results in files:
http://www.smail.lt/~ncss/regen_info/3995_Sony4000+0dbAtt_To_IQ14khz.j
pg
http://www.smail.lt/~ncss/regen_info/3995_Sony4028+0dbAtt_To_IQ14khz.j
pg
http://www.smail.lt/~ncss/regen_info/SonyTurnOff_To_IQ14khz.jpg
B. Conclusion:
In this case I think that
symetric sideband total compensation 40 ..50 db
is better B > A by 10 ... 20 db
form from inside decoder and
Dream IQ software components
Noise level B < A by 5..10 db
I measuring resistivity and voltage in catode:
LR Channel0: 480 Om , 0.26 V
LL Channel1 2270 Om, 0.96 V
2xEF86 anode voltage 33.3 V and summary current 0.92 mA
varying resistivity in valve catode
exchanges they electroconductivity, capacity, amplitude, frequency
and phase compensation conditions
Theory about quadrature oscillators i find in article
http://www.ee.ucla.edu/faculty/papers/razavi_2nd-JSSC-sept04.pdf
>> it can be shown that "antiphase" coupling of two identical
>>oscillators forces them to operate in quadrature ...
and
>> reduction of phase noise due to injection locking ...
IQ DRM decoder base on 2 x EF86 valves is self quadrature
oscillator, detector,
mixer, amplifier ( we can take 14 khz output from anode circuit
and throw out low frequency amplifier cascade ) with smaller
phase noise than one separate osciillator.
My conclusions and measuring very aproximately and
it is necessary repeat with constant amplitude signal
to IQ DRM decoder
Questions:
Who can repeat similar aproximately mesuring on
http://www.sat-schneider.de/download/Mixerflyer.pdf
or similar with inserted optional Quartz ?
Where buy 470Khz Quartz ( not pjezoceramic) ?
Best regards;
Saulius.
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