====== Test set T-105 ======
**Test set T-105**; manufactured by [[Autophon|Autophon AG, Solothurn]].

Autophon developed a test set matching the [[SE-206]], [[SE-207]] and [[SE-407]] radios for alignment and repair work.

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===== Technical data =====
  * [[Principle]]: Voltmeter, ohmmeter, 100 μA; device-specific measurements; **RF oscillator 34 - 50 MHz**, IF oscillator for the intermediate frequency of 1.65 MHz, AF oscillator 1000 Hz

==== Power supply ====
  * [[Battery operation]]: Heater battery [[10001]] 1.5 V; plate battery [[10103]] 103.5 V
  * [[Mains operation]]: 220 V

==== Dimensions ====
  * 353 x 227 x 210 mm, 7.5 kg

==== Accessories ====
  * Cable set in lid section, regulations

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===== Operation =====
The mains or battery-operated T-105 test set developed by Autophon allows maintenance and adjustments on the Autophon [[SE-206]] / [[SE-207]] and [[SE-407]] radios thanks to the built-in RF oscillator, which covers the 34 - 50 MHz frequency range. 

In addition to the radio frequency oscillator, which can be modulated at 1000 Hz. I1t also includes a crystal-controlled oscillatror working on the IF of 1.65 MHz and a tube voltmeter and ohmmeter for measuring the anode and heater voltages, among other things.


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For operation, the tester is connected to the radio with the measuring cables; the radio can be controlled from the tester via the operating cable without a headset.

The measuring instrument can be used to measure DC voltages of 3 V, 30 V, 300 V, 600 V and AC voltages of 3 V and 30 V. Resistance measurements with three ranges are also possible. The 12-position measuring switch can be used to carry out the same fault isolation measurements in positions 1 - 8 as with the [[EJ83]] test instrument; the test set is connected to the measurements socket on the radio or the [[SG94]].

The functions and test procedure are described in the regulations.

===== Technical principle =====
Quartz-controlled IF oscillator 1.65 MHz (two [[1V6]]), AF oscillator 1000 Hz, RF oscillator ([[1AD4]]).

==== Tube configuration ====
V1 ([[1V6]], IF oscillator); V2 ([[1AD4]], AF oscillator 1000 Hz); V3 ([[1V6]], 2nd stage IF oscillator); V4 ([[1AD4]], RF oscillator).

==== Development ====
The T-105 was developed for maintenance and alignment work on the [[SE-206]]/[[SE-207]] and [[SE-407]] radios from Autophon.

==== Use ====

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===== Technical documentation =====
  * {{ :manuals:t-105-regl.pdf |Test set T105, operating instructions}}, d, f
  * {{ :manuals:autophon-testgeraete-t105-t107-revision.pdf |Revisionsanleitung Testgeräte T105, T106, T107}}

==== Further information ====