Kiwame resistors - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st February 2008, 10:47 PM   #1
diyAudio Member
 
pmillett's Avatar
 
Join Date: May 2005
Location: Dallas (but I am not a Texan!)
Default Kiwame resistors

It looks to me like "Kiwame" resistors are really just KOA SPR2 and SPR5 carbon film resistors.

I got some 8.2k KOA SPR2 resistors in Japan for 4 cents each. I just compared them to 8.2k 2W Kiwame resitors.

I cannot find any differences between them.

Both have non-magnetic leads and end caps, which look by eye to be the same material. Both appear identical externally, and also inside the green coating (which I scraped away with a knife).

I measured 20 pcs. of the KOA resistors and all were within 0.25% of nominal - most within 0.1%. These are specified as 5% resistors.

I believe that they are the same thing, and "Triode Co." in Japan is just selling the KOA's at a premium price.

The KOA SPR series is not very common, but Mouser in the US carries a limited selection of the 2 watt parts.

Pete
  Reply With Quote
Old 1st February 2008, 11:25 PM   #2
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Pete,

THANK YOU!! Whatever Mouser stocks will save us from being gouged, at least some of the time.

Now, I wonder how good KOA-Speer low wattage Carbon film resistors are
__________________
Eli D.
  Reply With Quote
Old 1st February 2008, 11:43 PM   #3
defect9 is offline defect9  Ireland
diyAudio Member
 
defect9's Avatar
 
Join Date: Sep 2007
Location: Carson City, NV
/runs to go buy a fudgeload of resistors of various types

am I the only one that thinks someone could easily buy the KOA and pass them off as Kiwame, with significant profits? And that its possible someone is already doing it? Don't worry, you won't find me selling them on ebay. I'm too lazy for that.

however, if I can get significant savings doing it this way, no harm done, right? $0.16 versus $2 is worth it to me. I'll get some of the Kiwames just for comparison to hear for myself, but if it;s true, or close enough, then I'm one very happy dude.

...can anyone find cheaper Caddock and/or Rikens? Maybe some cheap Blackgates, Jensens, or any of the other good caps?

I'd not be too surprised if this sort of thing happens often...
  Reply With Quote
Old 2nd February 2008, 07:28 AM   #4
ja2dhc is offline ja2dhc  Japan
diyAudio Member
 
Join Date: Dec 2007
Send a message via AIM to ja2dhc Send a message via MSN to ja2dhc Send a message via Yahoo to ja2dhc
Hi, Pete-san

I fully agree with you. I found the data sheet of KOA SPR resistor
from KOA Germany Web site as below.

http://www.koaeurope.de/at/koa/pdf/spr(x).pdf

It clearly says SPR is Carbon and SPRX is metal film.

'73 de JA2DHC
  Reply With Quote
Old 2nd February 2008, 11:24 AM   #5
diyAudio Member
 
Join Date: May 2007
Thanks Pete,
Checked Mouser and they had the 1/2watts too. Was just about to order Kiwames when I saw this thread.
Thanks again!
  Reply With Quote
Old 2nd February 2008, 11:57 AM   #6
diyAudio Member
 
kstagger's Avatar
 
Join Date: Dec 2003
Location: Grand Rapids
I ordered some last night - before we deplete the stocks!
  Reply With Quote
Old 3rd February 2008, 06:12 AM   #7
defect9 is offline defect9  Ireland
diyAudio Member
 
defect9's Avatar
 
Join Date: Sep 2007
Location: Carson City, NV
Quote:
Originally posted by kstagger
I ordered some last night - before we deplete the stocks!
People have been afraid of depleting the stocks since september, or earlier (earliest I found a mention was from september on a different DIY site). I don't think we have to worry

-J
  Reply With Quote
Old 3rd February 2008, 01:08 PM   #8
diyAudio Member
 
kstagger's Avatar
 
Join Date: Dec 2003
Location: Grand Rapids
Quote:
Originally posted by defect9


People have been afraid of depleting the stocks since september, or earlier (earliest I found a mention was from september on a different DIY site). I don't think we have to worry

-J

Suppose they will restock the values necessary - just the experience of buying NOS tubes makes you paranoid
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sugar vs MOX vs Kiwame Malefoda Multi-Way 0 13th February 2008 07:33 AM
feedback on kiwame please jarthel Parts 1 25th May 2006 03:02 PM
Kiwame hawkfeather Parts 3 28th January 2006 03:28 AM
Kiwame question... hawkfeather Solid State 0 27th January 2006 12:51 AM
Riken Ohm Vs Kiwame FREQUENCY Tubes / Valves 3 2nd April 2005 04:32 PM


New To Site? Need Help?

All times are GMT. The time now is 08:40 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2