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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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Old 4th Jun 2020, 4:28 pm   #1
Snarf81
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Default Resistor info please.

Hi all,

My N1700 repair saga continues and I'm looking for info on a particular resistor please. I'm rubbish at remembering the values by the colour bands and if it's 1/2w, 1w etc etc.

The resistor in question is the lighter coloured one in the picture. It looks as if it's Brown, Green, Green, Gold. I'm thinking it's a 1.5Mohm, but can someone please confirm before I try to search for one for sale please?

Many thanks for your patience with my maybe obvious question. Haha.

Regards
Rich.
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Old 4th Jun 2020, 4:32 pm   #2
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Default Re: Resistor info please.

Why do you want to replace it? Have you tried testing it? The top solder joint doesn't look too good either,
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Old 4th Jun 2020, 4:42 pm   #3
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Default Re: Resistor info please.

I want to buy some more of the same value. This 'ugly' solder joint is on a modification to make the N1700 play and record at half speed. I want to do this modification to my other working N1700 as it plays back certain tapes better than the machine with the modification. It will save me swapping over the modification from machine to machine to get the best results.
Cheers,
Rich.
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Old 4th Jun 2020, 4:44 pm   #4
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Default Re: Resistor info please.

It is 1.5M.5%
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Old 4th Jun 2020, 4:47 pm   #5
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Default Re: Resistor info please.

1.5 megohm 5% looks like about a quarter watt one
The other fellow is 620k and looks like 2%

Higher value carbon film parts do tend to age upwards, but nothing like carbon composition do. Metal film resistors are probably the most stable over time.

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Old 4th Jun 2020, 4:53 pm   #6
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Default Re: Resistor info please.

Thank you for the replies! Marvellous.

I'll have a look online for a few to order.

Cheers,
Rich.
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Old 6th Jun 2020, 1:41 pm   #7
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Default Re: Resistor info please.

I can't seem to find any of these resistors for sale online. Would anyone have a few they could sell to me please?
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Old 6th Jun 2020, 2:14 pm   #8
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Default Re: Resistor info please.

Hi Rich

These should do you.

https://www.ebay.co.uk/itm/20-x-Meta...-uI-LQohBmRn5A

They are 1% but that's no bad thing

These are 2% I doubt that they are 10W

https://www.ebay.co.uk/itm/Vintage-P...IAAOSwPHxbI9lG

Look good

Cheers

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Old 6th Jun 2020, 2:35 pm   #9
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Default Re: Resistor info please.

Hi Mike,
Thank you! I tried looking them up on Ebay but couldn't find the exact value. I'm tempted to get the ones in the second link, only because they're age appropriate to my n1700. I'm guessing they'll be ok regardless of the 10w rating?

Many thanks again, Mike.

Rich.

Last edited by Snarf81; 6th Jun 2020 at 2:38 pm. Reason: Info
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Old 6th Jun 2020, 2:48 pm   #10
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Default Re: Resistor info please.

I think they are more likely 0.5W ot 1W and the 10W is just part of the numbering.

10W are going to be wirewound.

After all spot where it says they are 1.5M Ohm

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Old 6th Jun 2020, 2:59 pm   #11
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Default Re: Resistor info please.

Lovely, thanks.
I've just ordered them. Hopefully they'll do the job perfectly.

Thanks again,

Rich.
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Old 6th Jun 2020, 3:48 pm   #12
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Default Re: Resistor info please.

My go-to place for resistors is Cricklewood Electronics, for future reference. They don't (much like other places) do much in the way of carbon composition, but carbon film and metal film - yes! Their prices are good and shipping is pretty fast. I have no connection other than a satisfied customer. Here are the carbon film 1M5:

https://www.cricklewoodelectronics.com/H1M5.html

Colin.
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Old 6th Jun 2020, 3:51 pm   #13
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Default Re: Resistor info please.

Thanks, Colin.

I'll put them in my bookmarks.

Cheers,
Rich.
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Old 6th Jun 2020, 6:00 pm   #14
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Default Re: Resistor info please.

Another heads up for Cricklewood. Fast, efficient and sell 'proper' components!
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Old 7th Jun 2020, 1:19 pm   #15
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Default Re: Resistor info please.

Resistors ordered.

Thanks to those who helped me, I appreciate it very much.
Can this be closed now please mods?

Rich.
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