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Title: DM-33-A Dynamotor,brushes Post by: SM6OID 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. Title: Re: DM-33-A Dynamotor,brushes Post by: W2PFY on July 07, 2020, 01:29:13 PM https://hettinger.gwpunchout.com/category.php?catlevel1_code=ELEC&catlevel2_code=BRSH (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.. Title: Re: DM-33-A Dynamotor,brushes Post by: Opcom 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.
Title: Re: DM-33-A Dynamotor,brushes Post by: W2PFY 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. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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