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Transistor Covers in 1A4 - Tek Item 200-0715-00
I completely forgot to mention that the covers for the pairs of transistors in the attenuators, per the item number in the subject line, have rotted in my unit. What have you used to replace them? Has
I completely forgot to mention that the covers for the pairs of transistors in the attenuators, per the item number in the subject line, have rotted in my unit. What have you used to replace them? Has
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PMF
· #193395
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1A4 Cracked Variable Potentiometer Repair - Which Epoxy to Use?
Thanks for all of the suggestions. While I hadn't known the name, the Adney Rings had inspired my (feeble) attempt to surround the cross of the Variable control pot with a ring made of PEX-b that I ha
Thanks for all of the suggestions. While I hadn't known the name, the Adney Rings had inspired my (feeble) attempt to surround the cross of the Variable control pot with a ring made of PEX-b that I ha
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By
PMF
· #193393
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1A4 Cracked Variable Potentiometer Repair - Which Epoxy to Use?
I did a quick search and found some cryptic comments in one or two instances of someone using a particular glue or epoxy to repair the above. Alas, the correspondent made no mention what he was using,
I did a quick search and found some cryptic comments in one or two instances of someone using a particular glue or epoxy to repair the above. Alas, the correspondent made no mention what he was using,
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By
PMF
· #193374
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Leo Bodner Fast Rise Pulse Generator for 453 & 547?
Zen, I did make some progress with the 067-0521-00 Calibration Fixture on my 547 and need only remove a small dip or 'anti-bump,' if I may, in the first 10 nS of the top of the square wave. Otherwise,
Zen, I did make some progress with the 067-0521-00 Calibration Fixture on my 547 and need only remove a small dip or 'anti-bump,' if I may, in the first 10 nS of the top of the square wave. Otherwise,
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By
PMF
· #193017
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Leo Bodner Fast Rise Pulse Generator for 453 & 547?
Zen, In that case, I might return to the 067-0521-00 to see what the waveform looks like after I blundered into adjusting the whole system with the Bodner. You make a very good point anent standardizi
Zen, In that case, I might return to the 067-0521-00 to see what the waveform looks like after I blundered into adjusting the whole system with the Bodner. You make a very good point anent standardizi
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By
PMF
· #192896
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Leo Bodner Fast Rise Pulse Generator for 453 & 547?
I started to use my recently received Leo Bodner Fast Rise Pulse Generator (BNC) on my Tek 547/1A1 before wondering if I should seek advice here. I will stipulate that I had looked through the archive
I started to use my recently received Leo Bodner Fast Rise Pulse Generator (BNC) on my Tek 547/1A1 before wondering if I should seek advice here. I will stipulate that I had looked through the archive
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By
PMF
· #192890
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Type 106 Saga (Again)
I can answer yes to both of your final questions and am reassured by your logic anent the proper voltage at Q224/Q227. That does make a lot more sense to me, and I was probably just thinking that Tek
I can answer yes to both of your final questions and am reassured by your logic anent the proper voltage at Q224/Q227. That does make a lot more sense to me, and I was probably just thinking that Tek
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By
PMF
· #191879
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Type 106 Saga (Again)
Albert, Noted re Zener. Additionally, all stressed and damaged components were the first to be replaced, followed by many related items. I had begun to think that I might reduce the 15K dropping resis
Albert, Noted re Zener. Additionally, all stressed and damaged components were the first to be replaced, followed by many related items. I had begun to think that I might reduce the 15K dropping resis
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PMF
· #191875
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Type 106 Saga (Again)
Stephen, I hope that your father's condition is at least stable, if not improving. Have you had any time to attend to your 106 - if your father's condition has stabilized, of course. Dave, Albert, et
Stephen, I hope that your father's condition is at least stable, if not improving. Have you had any time to attend to your 106 - if your father's condition has stabilized, of course. Dave, Albert, et
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By
PMF
· #191846
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Type 106 Saga (Again)
Dave, I should have been much more explicit. I had been using the 10X probe with my 547 oscilloscope and had resorted to the DMM probe as a handy (or lazy) way of loading the circuit to quench that os
Dave, I should have been much more explicit. I had been using the 10X probe with my 547 oscilloscope and had resorted to the DMM probe as a handy (or lazy) way of loading the circuit to quench that os
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PMF
· #191780
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Type 106 Saga (Again)
Dave, Apologies! Yes, TO-66. I probably got it in my thick head that it was the other package while looking at a transistor testing guide (Told you all that I am not 'transistorized!'). I like the ide
Dave, Apologies! Yes, TO-66. I probably got it in my thick head that it was the other package while looking at a transistor testing guide (Told you all that I am not 'transistorized!'). I like the ide
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By
PMF
· #191775
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Type 106 Saga (Again)
Stephen, It's not just that control setting but its effect upon the three main power supplies that is what is so remarkable and is why I had emphasized following the set up in the manual for measureme
Stephen, It's not just that control setting but its effect upon the three main power supplies that is what is so remarkable and is why I had emphasized following the set up in the manual for measureme
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PMF
· #191761
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Type 106 Saga (Again)
I think one of the subsequent modifications that Tek put out, which was the replacement of Q247, a 2N3739, to a more robust 2N4240 transistor, helped control some of these 'A Supply' power aberrations
I think one of the subsequent modifications that Tek put out, which was the replacement of Q247, a 2N3739, to a more robust 2N4240 transistor, helped control some of these 'A Supply' power aberrations
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PMF
· #191695
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Type 106 Saga (Again)
Stephen, Have more (futile) suggestions and comments. First, in all of your repairs, did you replace C56 and check on the condition of C92, C94, and C95? I know that you were just rewiring the output
Stephen, Have more (futile) suggestions and comments. First, in all of your repairs, did you replace C56 and check on the condition of C92, C94, and C95? I know that you were just rewiring the output
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PMF
· #191573
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Type 106 Saga (Again)
Stephen, Might be more desperation than sense for this suggestion, but you also confirmed that the heater voltage, at pins 4 & 5, is correct? Also, is R206, the 100K, still within tolerance? It connec
Stephen, Might be more desperation than sense for this suggestion, but you also confirmed that the heater voltage, at pins 4 & 5, is correct? Also, is R206, the 100K, still within tolerance? It connec
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By
PMF
· #191356
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Type 106 Saga (Again)
I am enduring my own 106 difficulties, which are partly resolved, but wonder if you could confirm that you still have a signal at the collector of Q54 when you have set up your instrument per 'Voltage
I am enduring my own 106 difficulties, which are partly resolved, but wonder if you could confirm that you still have a signal at the collector of Q54 when you have set up your instrument per 'Voltage
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By
PMF
· #191337
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