XPost: sci.electronics.design
From: liz@poppyrecords.invalid.invalid
Cursitor Doom wrote:
[...]
> Sorry for the delay; took a bit of tracking down but I have it now:
>
> https://disk.yandex.com/i/3SiZ6rN_k-fP4w
Here's my version. I couldn't display the tables as tables, so I have
repeated the headers as individual paragraphs. One or two bits didn't
make sense, so I have indicated them with question marks. See the
originalpublication for the diode probe circuit.
Beware, the text is scattered with roman numerals.
INSTRUCTIONS FOR ADJUSTMENT
Agjustment on 9v D.C.,
Adjustment of the final audio Push-Pull stage.
Insert a milliameter in place of the link at the Collector of AC 188 K
(use point -x-). Adjust the quiescent current to 6.5mA by means of R410
(500 0hms). After adjusting the current, resolder the link.
Adjustment of the IF amplifier:
By means of R515, adjust the Collector current of T IV to obtain a
voltage drop of 1.35V across the Emitter resistorR518
-----------------------------
Adjustments FM intermediate frequency 10.7 Mhz Switched to "FM".
Adjustment: F VII
Couple wobbulator output to: MP5
Measuring equipment: Diode probe [as circuit] to F VII point 6
Adjust for: (a) Off tune. ( b) At maximum and symmetrical
Adjustment: F VI & F V
Couple wobbulator output to: MP3
Measuring equipment: Diode probe [as circuit] to F VII point 6
Adjust for: (c) & (d) maximum and symmetrical
Adjustment: F IV & F III
Couple wobbulator output to: MP2
Measuring equipment: Diode probe [as circuit] to F VII point 6
Adjust for: (e) & (f) maximum and symmetrical
Adjustment: FII & FI
Couple wobbulator output to: ?close? to mixer
Measuring equipment: Diode probe [as circuit] to F VII point 6
Adjust for: (g) & (h) maximum and symmetrical
Adjustment: Discriminator
Couple wobbulator output to: MP5
Measuring equipment: Across 50 kilohm cable on MP11 (at audio input)
Adjust for: symetricality. During this sdjustment the signal must be
very weak so that FI doesn't limit.
-----------------------------
Adjustments AM intermediate frequency 460 Khz Switched to Medium Wave
["PO".]
Adjustment: F XIII & F XII
Couple wobbulator output to: MP3 F III
Measuring equipment: Test point ?? MP4
Adjust for: (I) & (II) maximum and symmetrical
Adjustment: FXI
Couple wobbulator output to: MP8
Measuring equipment: Test point ?? MP4
Adjust for: (III) maximum and symmetrical
Adjustment: F X & F IX
Couple wobbulator output to: CV AM, MP7
Measuring equipment: Test point ?? MP4
Adjust for: (IV) & (V) maximum and symmetrical
--------------------------
Adjustment of the AM oscillator and input stage.
When aligning Long Wave and Medium Wave, couple to the ferrite rod
aeraial across the frame [????]. Short Wave alignmnet is done with the
telescopic aerial unsoldered. The signal is injected by a 15pf
capacitor into the telescopic aerial terminal.
Medium Wave
Tuning dial set to 560 Khz
Adjust oscillator for (1) maximum
Adjust input circuit for (3) max
Mixer sensitivity 13uV
Oscillator output 60 - 90 mV
Medium Wave
Tuning dial set to 1450 Khz
Adjust oscillator for (2) maximum
Adjust input circuit for (4) max
Mixer sensitivity 14uV
Oscillator output 60 - 90 mV
Long Wave
Tuning dial set to 160 Khz
Adjust oscillator for ---
Adjust input circuit for (6) max
Mixer sensitivity 13uV
Oscillator output 65 - 95 mV
Long Wave
Tuning dial set to 240 Khz
Adjust oscillator for (5) maximum
Adjust input circuit for (7) max
Mixer sensitivity 10 uV
Oscillator output 65 - 95 mV
Short Wave
Tuning dial set to 6.6 Mhz
Adjust oscillator for (8) maximum
Adjust input circuit for (10) max
Mixer sensitivity 5 uV
Oscillator output 35 - 90 mV
Short Wave
Tuning dial set to 15 Mhz
Adjust oscillator for (9) maximum
Adjust input circuit for (11) max
Mixer sensitivity 4.5 uV
Oscillator output 35 - 90 mV
---------------------
Oscillator and IF alignment
Tuning dial set to 88 Mhz
Adjust oscillator for (A) maximum
Adjust IF coil for (C) max
Hiss level around 5 kT0 ... [No idea what that means]
Oscillator voltage on Emitter of T II 75 - 85 mV
Tuning dial set to 106 Mhz
Adjust oscillator for (B) maximum
Adjust IF coil for (D) max
Hiss level around 5 kT0 ... [No idea what that means]
Oscillator voltage on Emitter of T II 75 - 85 mV
Notes:
Inject the signal from an oscillator with an internal impedance of 60
ohms directly into the mixer. After alignment, coupled by 60 ohms, the
fundamental of the oscillator into the input of the mixer must be less
than 2 mV.
--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk
--- SoupGate-DOS v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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