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Need schematic on series 260 / 130 watt amp. brd. circa. 6/9/72. In particular value of 1/4 watt resistance in input diff. pair coll. ckt. from B- rail & 1/4 watt resistance in coll. ckt. pnp class b driver to B- rail.

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Hi REBECCADAVIS


How did you get on? Need a cricuit diagram? There is one in the back of this manual.

regards
Robotek

Posted on Jun 10, 2008

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6ya6ya
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Kenwood KAC-PS811D


you did not mention the size (wattage) of the resistor. If it's 1/4 or
1/8 watt, AND you can't find ANY information about the amp, then try
a 10k, if won;t work, then try 1K. (or try 100k -> 10K -< 1K),
if wattage is 1+ watts, likely will be a lower value try sequence
(1K -> 100 ohm -> 10 ohm -> ?? 1ohm.... caution on lower values,
current surge may take out more components). Really, really try
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PDR-8 Specifications
Design
Single driver, bass reflex system with critically tuned resistive port and built-in amplifier Amplifier High-current, discrete output, 90 watts RMS
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Did you find a solution? Dunno if it's much help, but I just today picked up some 501s - Series I I think - ugly heavy brown material grilles - but with a manual! No fuses in these, but booklet recommends installing your own in-line fuse holders (!?). Specifies a BUSS AGC-3 fuse for amps under 50wpc; or a MDL-2 fuse for amps over 50 wpc. Can be placed is series with either or the two signal wires. Very strange.... Robin

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What is the value of the resistor that burns up when to much RF power is input?


Hi wrightjc2,
Most common burned resistor are those with low resistance because it acts like a fuse to avoid further damaged to some parts if shorts,overload happened. But still best to have a schematic diagram to identify the burned one. If you haven't a schematic you may get the resistance of the resistor, measure it to the middle where the burned cut out, add the resistance from one half side to other half side. You may now have an Idea what may be the value of the burned resistor.
Hope I helped you.
Have a nice day!
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PV Delta Blues. Resistor R-58. What's the value and wattage?


It appears to be a 430 ohm 5 Watt FLAMEPROOF resistor... The resistance value could also be 470 ohms...

Here is link to a 430 ohm:

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=PPC5W430TB-ND

Here is link to schematic, however the resistance value is blurred but starts with 4 and is three digits leaving only 430 or 470 as the value:

http://elektrotanya.com/peavey_delta_blues_sch.pdf/download.html

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Just a hint to troubleshoot: Connect a 100 Watt light bulb in series with the hot side of the power line into the amp. Make a cord with a light socket and a receptacle to plug the amp into. This acts as a resetable fuse and will send enough current through the amp to not fry stuff, but enough to do troubleshooting.

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R106 is a .5 ohm. It is green,black,gold, and silver. I believe it is a 1/2 watt resister
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Need resistor value for RK62 on DP2X board for 57SWX20B


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