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 FISK RADIOLA MODEL 263
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 Return to top of page · Post #: 1 · Written at 11:52:02 AM on 29 September 2019.
Bowler's Gravatar
 Location: Bongaree, QLD
 Member since 26 October 2018
 Member #: 2308
 Postcount: 17

GOOD MORNING ALL, HAVE JUST RESTORED A RADIOLA 263 TO WORKING ORDER. THE VOLUME CONTROL IS IN THE DETECTOR CIRCUIT, AND WHEN I ADVANCE THE CONTROL BY ABOUT 250 OHMS THE VOLUME IS EXTREMELY LOUD. THERE DOES NOT APPEAR TO BE A SMOOTH INCREASE IN VOLUME. THE POT IS A 300K LOG POT AND ANY MORE THEN THE 250 OHMS THE VOLUME IS UNBEARABLE. WONDERING IF ANY ONE ELSE HAS HAD THIS PROBLEM. BOWLER


 
 Return to top of page · Post #: 2 · Written at 5:58:16 PM on 29 September 2019.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5262

QUOTE: When posting a comment please remember:-

...

3. Please refrain from using all-lower-case and all-upper-case text


 
 Return to top of page · Post #: 3 · Written at 6:20:52 PM on 29 September 2019.
Robbbert's avatar
 Location: Sydney, NSW
 Member since 18 September 2015
 Member #: 1801
 Postcount: 1074

Measure the resistance of the pot. You might find it's open circuit at the earthy end.


 
 Return to top of page · Post #: 4 · Written at 8:31:05 AM on 30 September 2019.
Arty41's Gravatar
 Location: Brisbane, QLD
 Member since 18 September 2010
 Member #: 118
 Postcount: 289

As well as measuring the pot have you tried another one, 300k is not common, try 250k or even experiment with a 500k purely for elimination..


 
 Return to top of page · Post #: 5 · Written at 11:17:53 AM on 25 October 2019.
Sirwin's avatar
 Location: QLD
 Member since 10 April 2009
 Member #: 465
 Postcount: 101

The volume control is quite conventional in this set. (Unlike some AWA sets.) Check that the pot is wired in correctly. Also check that the AGC system is working correctly. Does the tuning indicator work as it should? To test potentiometers, I place a voltage, say 10 volts across it (out of circuit) and monitor the output voltage (wiper to common) with a CRO. As you turn the control, the trace should move smoothly from 0 to 10 volts. Any jumping up and down of the trace indicates trouble.


 
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