Mitchell Mfg. Co. 1255 Schematic

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Product Information:
Model:1255
Manufacturer:Mitchell Mfg. Co.
Description:the madrigal

Schematic Pages

Schematics Content:

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Page 1:

PAGE 22-2 .MITCHELL '
law rr I3
m??& '?$ "&2L iii ?'?
NoTE- IT Is ABSOLUTELY NECESSARY TI-IAT AN ACCURATELY CALI- 3
BRATED TEsT osCILLAToR wm-I son/IE TYPE of OUTPUT MEASURING :
DEVICE BE USED WI-IEN ALICNING THE RECEIVER AND THAT THE PRO -
CEDURE BE CAREFULLY FoLLowED, OTHERWISE Tl-IE RECEIVER wn.L
BE INSI-:NSITIVE AND THE DIAL CALIBRATION wILL BE INCORRECT. THE PARTS LIST |
E REFERRED To BY THEIR FUNCTION As INDICATED _ ,LL,,s_ pm
TRI 5 WILL B '??'" ,'"?;,, ,,Em,,m,, no. mann nsacnmlou
oN THE PARTS DIACRAM. - 'M
cz.c1.os ll-laws. comm . rm .05 urn. zm v. l
ALIGNMENT rnocenuns cl... ?......::. l....: ll. ._ l, rssmll; lzzlllztzl ?"" "'?"
5 TEST OSCILLA-1-OR _ gs n-my comlumr. nur' .os urn. M Ta I-soul Irmlonml-,!ou;`u?" mmm'
lo ll-mls comlmef, cm' ? loo mm. v.
T sET RECEIVER ADJUST TEST ATTACH OUTPUT OF DUMMY CH Mm ??"mm_ ,mr _ms Mm mo ,_ Mm swam' 5 lm ,_"_
E DIAL To g osCILLAToR TEST osCILLAToR ANTENNA ADJUSTMENTS clz ll-me cmlflamf, cumw no mm. gm v. 10; u~aous Amluly. am, ummm- I rlll .y
C|5g |00 MFD- |50 V. \|'EUR387 Esmichnwly Dill
poinz where High side no grid of Adjust slugs auop 5| _ md P U Mm W v_ H391 P?'"*?'>> U!" |v\di?=i?r
no imefferlug EXACTLY ocmwerzef Tube, Low .os MED and hmmm of znd 7 N me 'mr' "W 5 " '??? ?'""' L'"? ' ? F" """?'
I signaI is re- 455 KC slcle so comma neg CONDEN- I.I~'.(Tzl and then nl ll-uoez nulmr. ww- 3.3 mmlll l/1 w. zo; #am calm, lvmy Plmlc nom 155
"wed "vs_ . SER each of the SNES llmtl Il-was Resistor, cal-mn ~w,000 Ohm IIN- 20% ll-aooa um, lmy rlmlc g only
Of 'he lst- I-F~f?f ml Il-lzsz rw>>l~1=>r. nmol l.o mam l/z v~ 201 #als c-mfuf, ~.lf.ll? l=l..u?> mel lm
maximum output. R5 I-Suas Rulstvr. Olrbm 68 Ohm I/2 W~ |01 I-sow lamb, wulmn. Plastic) only
z RC blue lead on loop Coudeu- (C:) im maxmlum R9 Wm, ,,,,i,,?,_ c,,b,,,, .wagon mu. l/Iv. znf.
ls-aan mf cms.. leo ohm l/ lu;
mo Adj" t 1400 KC ull ll-sau: nnlmr, umm l,wn ohm l/zw. lu;
J Approx. Approx. Ex?eI>>ua1 Antenna D antenna :rim-
; 1400 RC 1400 xc blue Iead on loop. Conden- mer for maxa-
>> se . mum ouap ?;___
John F. Rider ,

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