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Shipped They Are
My boards arrived yesterday. They look great. Many thanks to Jared for the design and layout and to Larry for making the group buy happen and distributing all the sets. Started assembling only to find
My boards arrived yesterday. They look great. Many thanks to Jared for the design and layout and to Larry for making the group buy happen and distributing all the sets. Started assembling only to find
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By
Mac Perkins
· #178976
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A question from the unwashed relative to: I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
Out of about 30 TM 500 power frames I have had 7 that had misphased AC windings in at least one slot, no sign of any post-factory work in them. Failed pass transistors are pretty common. I have not se
Out of about 30 TM 500 power frames I have had 7 that had misphased AC windings in at least one slot, no sign of any post-factory work in them. Failed pass transistors are pretty common. I have not se
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Mac Perkins
· #175811
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I built a TM500 mainframe tester, and updated the design. Someone might find this useful?
I also would be interested in a set of boards if they aren't too pricey. A source of the mechanical parts is plug-ins for the 5000 series scopes e.g. 5103, 5440, which use exactly the same form factor
I also would be interested in a set of boards if they aren't too pricey. A source of the mechanical parts is plug-ins for the 5000 series scopes e.g. 5103, 5440, which use exactly the same form factor
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By
Mac Perkins
· #175785
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Scope grounding and generators
Even if you have a dedicated ground rod for your generator, please bond (connect) that ground and your house ground (generally a bare wire coming from the ground rod to the electrical panel). Since a
Even if you have a dedicated ground rod for your generator, please bond (connect) that ground and your house ground (generally a bare wire coming from the ground rod to the electrical panel). Since a
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Mac Perkins
· #172600
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SG505 THD issues
You say you have a 22-22kHz filter, that generally is an option 2 instrument which also changes the response choices to true rms or quasi-peak. The quasi-peak position will give significantly higher r
You say you have a 22-22kHz filter, that generally is an option 2 instrument which also changes the response choices to true rms or quasi-peak. The quasi-peak position will give significantly higher r
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Mac Perkins
· #145305
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(OT) Wanted Red/Green LED with separate cathodesAND anodes (4 le
Why not use the SMD LED and a bit of Plexiglass rod (light pipe)? -Mac
Why not use the SMD LED and a bit of Plexiglass rod (light pipe)? -Mac
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Mac Perkins
· #110884
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TM506, TM506A or TM5006?
Note that the TM506A is built on the TM5006 frame with brute force unregulated DC rails, like the regular TM506. It does have one great advantage over the TM506 in that it shares the TM5006 forced air
Note that the TM506A is built on the TM5006 frame with brute force unregulated DC rails, like the regular TM506. It does have one great advantage over the TM506 in that it shares the TM5006 forced air
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Mac Perkins
· #109499
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Tek 5006 caps
I have a few TM5006 frames and have found a consistent failure of capacitors CC2100, C2200, C2200, and C2310. They are 390 uF 40V caps on the + and - 26V rails to the plugins. I had one fail shorted w
I have a few TM5006 frames and have found a consistent failure of capacitors CC2100, C2200, C2200, and C2310. They are 390 uF 40V caps on the + and - 26V rails to the plugins. I had one fail shorted w
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By
Mac Perkins
· #108996
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7K frame parts needed
Hello all, If anyone is scrapping one of the four hole 7000 series scopes, I am in need of the two bottom frame rails, the ones the feet mount to. They are the same on the 7854 and 7704A and should be
Hello all, If anyone is scrapping one of the four hole 7000 series scopes, I am in need of the two bottom frame rails, the ones the feet mount to. They are the same on the 7854 and 7704A and should be
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By
Mac Perkins
· #87765
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7854 parts needed
I won a very clean 7854 on evilbay, complete with all manuals and calculator. Unfortunately, despite a high shipping charge and request for good packing it was damaged in shipping due to inadequate pa
I won a very clean 7854 on evilbay, complete with all manuals and calculator. Unfortunately, despite a high shipping charge and request for good packing it was damaged in shipping due to inadequate pa
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By
Mac Perkins
· #79966
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AM700 FFT LF residual noise Problems
I also have an AM700, which I picked up at an attractive price some time ago. It works fine after about a 20 minute warmup. I know I need to really get into it and find the failing caps, but other pro
I also have an AM700, which I picked up at an attractive price some time ago. It works fine after about a 20 minute warmup. I know I need to really get into it and find the failing caps, but other pro
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By
Mac Perkins
· #74166
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TM 500 Power Module Tester
I too would be interested in this. Thanks for sharing it. -Mac
I too would be interested in this. Thanks for sharing it. -Mac
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By
Mac Perkins
· #51809
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