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DM-33-A Dynamotor,brushes




 
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Author Topic: DM-33-A Dynamotor,brushes  (Read 497 times)
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SM6OID
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« on: July 07, 2020, 12:56:16 PM »

Hi!

Anyone who has some spare brushes for me or know where to search?
The HV brushes are most important, the LV ones will work.
DM-33-A is the dynamotor for the BC-456 modulator for the SCR-274-N system.
So, if anyone happens to know of a source of brushes or complete DM-33-A or DY-8 dynamotors, let me know!

The things is that some of my command transmitters will be put on the air with original supply/modulator.
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W2PFY
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« Reply #1 on: July 07, 2020, 01:29:13 PM »

https://hettinger.gwpunchout.com/category.php?catlevel1_code=ELEC&catlevel2_code=BRSH

You might give them a call. I used to deal with them decades ago and they had a huge inventory. You may have to send them some info such as a picture and size etc.. 
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Patrick J. / KD5OEI
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« Reply #2 on: July 09, 2020, 01:39:51 AM »

No luck on that one here. i have a few DMs. One thing to know besides size is the diameter of the commutator since the brushes have to fit that as well.
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« Reply #3 on: July 09, 2020, 12:08:33 PM »

There are brush seating stones but one must be careful not to over use them, as the commutator may need to be undercut again, to recede the mica separators. 
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