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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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25th May 2023, 1:29 pm | #21 |
Dekatron
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,244
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Re: Resistor Question. Hacker Talisman GP46.
Agreed - should be red, red, black, red, brown.
A check on the DC voltages must be done as a matter of course. As I said earlier, the DC conditions must be correct for an audio amplifier before the signal is considered. If you don't know roughly what sort of voltages to expect, the manual contains a list of DC voltages. The manual is available from here: https://www.service-data.com/product...25/3488/m12625 |
25th May 2023, 1:40 pm | #22 |
Moderator
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Re: Resistor Question. Hacker Talisman GP46.
I always measure all replacement resistors before soldering them in place. It can be quite hard to distinguish the colours on modern resistors.
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
25th May 2023, 3:36 pm | #23 |
Pentode
Join Date: Jun 2020
Location: Woking, Surrey, UK.
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Re: Resistor Question. Hacker Talisman GP46.
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25th May 2023, 3:55 pm | #24 | |
Pentode
Join Date: Jun 2020
Location: Woking, Surrey, UK.
Posts: 146
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Re: Resistor Question. Hacker Talisman GP46.
Quote:
I wasn't sure if the manual available was the full manual or just the schematics (as a lot are these days) and thank you for the link. I do agree that if an amp isn't getting correct voltages, then there is no way it can amplify as it should. My circuit diagram only shows the 30v input from the power supply, which is reading correct . |
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25th May 2023, 4:42 pm | #25 | |
Dekatron
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
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Re: Resistor Question. Hacker Talisman GP46.
Quote:
David |
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25th May 2023, 5:05 pm | #26 |
Dekatron
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
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Re: Resistor Question. Hacker Talisman GP46.
I've always assumed that back in the day when resistors were usually inserted by hand, they had to be easily read by humans.
Whereas later when resistors were more typically inserted by machines, it's just a case of placing the start of the bandolier in the machine and letting the magic happen. Of course, the operator only needs to read the label on the box containing the bandolier. So there's much less incentive to worry about the quality of the colour bands. The light blue backgrounds that are so very commonly used to denote metal film resistors really don't help IMHO. Many years ago I was given some bandoliers from Philips that were a complete TV chassis. Well, all the axial components, at least: resistors, diodes, inductors, capacitors, and even some plain wire links. Fascinating, but all used up now. |