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547: Difference between revisions
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Vintage dave (talk | contribs) (C808 high DF self-heats and causes HV thermal runaway) |
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{{Spec | Power | 90-136 V or 180-272 V, selected via primary voltage selector (inside cabinet) and voltage range selector (on rear panel), 50/60/400 Hz, 510 W, AC Fan }} | {{Spec | Power | 90-136 V or 180-272 V, selected via primary voltage selector (inside cabinet) and voltage range selector (on rear panel), 50/60/400 Hz, 510 W, AC Fan }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Links== | |||
* [https://lazyelectrons.wordpress.com/2018/07/06/tektronix-547-oscilloscope-restoration 547 Restoration with video] | |||
* Tek 547 in "Reading Jim Williams" blog: [http://readingjimwilliams.blogspot.com/2011/10/scope-sunday-13.html Scope Sunday 13] and [http://readingjimwilliams.blogspot.com/2012/02/vintage-scopes-are-better-part-1.html Vintage Scopes are Better, pt.1] | |||
* "MightyOhm" blog: [http://mightyohm.com/blog/2012/02/an-analog-life-my-pilgrimage-to-the-workbench-of-analog-guru-jim-williams/ Jim Williams workbench] | |||
* [http://www.tek.com/blog/comparing-apollo-era-workhorse-today%E2%80%99s-bench-scope Comparing an Apollo Era Workhorse to Today’s Bench Scope] @ tek.com | |||
* Eiki Martinson: [http://eikimartinson.com/archives/41-Tektronix-547-Oscilloscopemdash;Getting-an-Old-Soldier-Back-in-the-Fight.html Tektronix 547 Oscilloscope—Getting an Old Soldier Back in the Fight] | |||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/547.htm Tek 547 page @ amplifier.cd] | |||
* [http://www.ebay.com/gds/The-Tektronix-547-Oscilloscope-Magic-in-the-Box-/10000000000725321/g.html The Tektronix 547 Oscilloscope - Magic in the Box] | |||
* [http://www.thevalvepage.com/testeq/tek/547/547.htm J.Evans's 547 page] | |||
{{Documents|Link=547}} | |||
{{PatentLinks|547}} | |||
==Internals== | ==Internals== | ||
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Heater voltage is applied to all tubes immediately when the power switch is turned on. | Heater voltage is applied to all tubes immediately when the power switch is turned on. | ||
A [[6N030T|6N030T delay tube (P/N 148-0021-00)]] controls a relay that switches plate supply voltages on only after the tubes are warmed up. | A [[6N030T|6N030T delay tube (P/N 148-0021-00)]] controls a relay that switches plate supply voltages on only after the tubes are warmed up. | ||
==Common Problems== | ==Common Problems== | ||