on this post add picture from blaupunkt 5501
fm filters
loss from filtration ajustators :
X - is fixed 220ohm anti socilation 10.7Mhz
* - is ajustator loss into briges
buttos to ajust selectivity
+ = wide 2X150[ fi mix]+150khz [fi out]
- = narrow ² = ½ 180khz filter in center brige connected to ground
# = narrow ajustable from loss 10.7mhz filter
audio amplifier from dx-er
radio blaupunkt is from 2.2A consumation , in this picture i add a tea2025 a 1,1w amplificator stereo and consumation is now in *! 0.34A
½ filter in picture
filter wived in exterior
decibelometer
first scale is from measure , in this exemple is in position 40dB
adaptable s-m to decibelometer circuit
tuner not exist for me , tuner not capable t add this circuits , is suks and very crazy. Amplfication from antena is a low noise mosfert , and tuner is a big noise from bipolar amplfiication.
Tuner is from beginers and radio blapupunkt with amplifier in pcb is from masive reception estimated from comunication inspection to 23X up to normal .This demonstration is a simple mensure reception on 88.2Mhz with a rhode schwartz and reception affised in lcd analysor indicate 14.7dBµV/m and receiver blaupunkt indicate a 38dB fixed no noise reception . Demonstrations not stop , tuner technis stgt550 have a 13dB up to normally , this suks tuner mensure valye 28dB in 88.2 ..
NOW radios auto old blaupunkt with casete is real receivers tuner and full range amplifiation AGC in sporadic , signals is without drops!
fm filters
loss from filtration ajustators :
X - is fixed 220ohm anti socilation 10.7Mhz
* - is ajustator loss into briges
buttos to ajust selectivity
+ = wide 2X150[ fi mix]+150khz [fi out]
- = narrow ² = ½ 180khz filter in center brige connected to ground
# = narrow ajustable from loss 10.7mhz filter
audio amplifier from dx-er
radio blaupunkt is from 2.2A consumation , in this picture i add a tea2025 a 1,1w amplificator stereo and consumation is now in *! 0.34A
½ filter in picture
filter wived in exterior
decibelometer
first scale is from measure , in this exemple is in position 40dB
adaptable s-m to decibelometer circuit
tuner not exist for me , tuner not capable t add this circuits , is suks and very crazy. Amplfication from antena is a low noise mosfert , and tuner is a big noise from bipolar amplfiication.
Tuner is from beginers and radio blapupunkt with amplifier in pcb is from masive reception estimated from comunication inspection to 23X up to normal .This demonstration is a simple mensure reception on 88.2Mhz with a rhode schwartz and reception affised in lcd analysor indicate 14.7dBµV/m and receiver blaupunkt indicate a 38dB fixed no noise reception . Demonstrations not stop , tuner technis stgt550 have a 13dB up to normally , this suks tuner mensure valye 28dB in 88.2 ..
NOW radios auto old blaupunkt with casete is real receivers tuner and full range amplifiation AGC in sporadic , signals is without drops!
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