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* [http://www.barrytech.com/tektronix/tektm500/tektr501.html Tektronix TR501 @ barrytech.com] | * [http://www.barrytech.com/tektronix/tektm500/tektr501.html Tektronix TR501 @ barrytech.com] | ||
* [[Media:Tekscope 1975 V7 N5.pdf | TekScope Vol. 7 No. 5, 1975]] p.11+: Fred Telewski, ''A high-stability 100 kHz to 1.8 GHz tracking generator'' | * [[Media:Tekscope 1975 V7 N5.pdf | TekScope Vol. 7 No. 5, 1975]] p.11+: Fred Telewski, ''A high-stability 100 kHz to 1.8 GHz tracking generator'' | ||
* [http://www.philipsradios.nl/forum/index.php?mode=thread&id=23396 TR501 repair @ Nederlands Transistorforum] (Dutch) with photos | |||
==Pictures== | ==Pictures== |