UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Components and Circuits

Notices

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.

Closed Thread
 
Thread Tools
Old 23rd Jun 2004, 7:52 pm   #1
PaulR
Dekatron
 
PaulR's Avatar
 
Join Date: Oct 2003
Location: Southport Lancashire, UK.
Posts: 3,221
Default Buying Resistors

I am not sure whether this is the right place for this enquiry, but here goes!

I am quite new to radio repairing and have only done a few. One of my problems is the bewildering values of components, particularly resistors, used. Capacitors aren't so bad as the values seem fairly standard and I have built up a reasonable selection by buying more than I need and by assuming that most will need replacing anyway to make the set really reliable.

Resistors seem much more reliable and so I haven't built up a stock. I see mixed lots on Ebay which might be a good start, but am not sure what wattage I need. Is this a good source or does anyone know of another source of "mixed bags"? Also what wattage should I use for general circuit work (as opposed to mains smoothing and such)?

Thanks

Paul

Last edited by Chris_C; 28th Dec 2004 at 2:12 pm.
PaulR is offline  
Old 23rd Jun 2004, 8:03 pm   #2
Paul Stenning
Administrator
 
Paul Stenning's Avatar
 
Join Date: Dec 2002
Location: Cardiff
Posts: 9,060
Default Re: Buying Resistors

The original resistors would have been 1/4W or 1/2W. However modern parts of these ratings will be too small, so we normally use 1W resistors as replacements. 5% tolerance is plenty good enough. The beige coloured ones don't look to out of place.

As for values - yes you will need a larger range, but you certainly don't need all of them. There generally aren't that many lower value resistoirs in radios, and where there are they tend to be more reliable.

My suggestions for starters would be:

10K, 22K, 47K, 100K, 150K, 220K, 330K, 470K, 680K, 1M, 1.5M, 2.2M, 3.3M, 4.7M, 6.8M and 10M. Get about 10 or 20 of each - they are cheap enough!

Mixed bags may contain more of the lower values that you are less likely to use. The trouble is that you don't know. You also have to sort them all out, which can be tedious and time-consuming - especially if you have to read and work out the colour code (with experience you just look at a resistor colour code and know the value instanty).
__________________

Paul Stenning
Forum Admin/Owner and BVWS Webmaster
Paul Stenning is offline  
Old 24th Jun 2004, 10:08 am   #3
Sideband
Dekatron
 
Sideband's Avatar
 
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,548
Default Re: Buying Resistors

I would also suggest some lower values like 100 ohms
220 ohms and 470 ohms of about 1 watt rating to replace cathode resistors in output stages.

Rich.
__________________
There are lots of brilliant keyboard players and then there is Rick Wakeman.....
Sideband is online now  
Old 12th Dec 2004, 4:51 pm   #4
Ed_Dinning
Dekatron
 
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,171
Default Re: Buying Resistors

Hi Gents, you can always series and parallel resistors to get the value that you do not have. This was often done in repair shops that had " run out " of a specific value, or needed a higher wattage than was available.
Ed

Last edited by Darren-UK; 19th May 2007 at 11:52 pm. Reason: Brought in line with remaining posts.
Ed_Dinning is offline  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 3:21 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.