01-27-2006, 12:07 PM
Hi- Thanks for the reply. The data I'm using is the Model 37-650 Service Bulliten, No. 254, from Philco. On the front page it gives voltages in Figure 1, with each socket referenced as to pin location and voltages. Most are just given as "100V" or "250V" and only the 6.3V positions are marked as AC. Is it possible I'm doing the wrong test? Should the higher readings be DC? and if so, would that account for the grossly higher readings? I have been using this chart as guide to checking voltages. I have the negative probe clipped directly to the chassis, near the power supply, and touch the tip of the red to the point indicated.
The paragraph under the test point chart states: "The voltages indicated by arrows were measured with a Philco 025 Circuit Tester which contains a voltmeter having a resistance of 1000 ohms per volt. Volume control at minimum, range switch in broadcast position, line voltage 115 A.C." My meter, in AC has 1000 ohms per volt sensitivity, and in DC has 20,000 ohms per volt sensitivity. (I have a 0-6000V ability)
As to the wiring, I replaced each wire one at a time- and referred greatly to the schematic- I have one of the large ones from Chuck S. laminated and clipped up in front of me.(I must say- sometimes takes a bit of figuring to reconcile reality with the schematic sometimes)
Let me know if I'm testing the power in the wrong way, or need a different probe- Right now I'm using a simple straight probe.
(Once I figure out these fancy toys- the ossy, the rf gen, I'll be set... lol)
Thanks!
Scott
The paragraph under the test point chart states: "The voltages indicated by arrows were measured with a Philco 025 Circuit Tester which contains a voltmeter having a resistance of 1000 ohms per volt. Volume control at minimum, range switch in broadcast position, line voltage 115 A.C." My meter, in AC has 1000 ohms per volt sensitivity, and in DC has 20,000 ohms per volt sensitivity. (I have a 0-6000V ability)
As to the wiring, I replaced each wire one at a time- and referred greatly to the schematic- I have one of the large ones from Chuck S. laminated and clipped up in front of me.(I must say- sometimes takes a bit of figuring to reconcile reality with the schematic sometimes)
Let me know if I'm testing the power in the wrong way, or need a different probe- Right now I'm using a simple straight probe.
(Once I figure out these fancy toys- the ossy, the rf gen, I'll be set... lol)
Thanks!
Scott
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