Jim, The old standard question, which direction should the fan run? I have fans on my TR-7/PS-7 pulling out. The "new" PS-7 is directed in.
I agree with you 100% on cooling the filter caps. They get a lot of stress. During the Drake Engineers reunion at the Dayton Hamvention I had the good fortune to speak with one of the guys who helped engineered the PS-7. He indicated people have misunderstanding about the PS-7 fan. Its purpose is to cool the filter caps, not the electronics. TNX es 73, Ron WD8SBB --- On Tue, 9/20/11, Jim Shorney <jshor...@inebraska.com> wrote: > From: Jim Shorney <jshor...@inebraska.com> > Subject: Re: [Drakelist] FW: Drake PS-7 test ideas > To: "drakelist@zerobeat.net" <drakelist@zerobeat.net> > Date: Tuesday, September 20, 2011, 12:04 AM > On Mon, 19 Sep 2011 22:10:38 -0400, > Curt Nixon wrote: > > >what will probably be the first issue will be hum on > >your transmit signal due to deteriorating main filter > caps. Exact > >replacements are not to be reasonably found--minimum > order qty puts them > >really out of reach and no one that I found stocks > them. There are a > >couple of very similar replacements to be had and they > will fit in the > >same frames and same top mounting hardware. > > > The best favor that can be done for those caps, whether new > or old, is to > install the accessory fan. It doesn't need to be an > authentic FA-7, it's a > common form factor. > > 73 > > -Jim > > > -- > Ham Radio NU0C > Lincoln, Nebraska, U.S.S.A. > TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, > R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, > all the time! > > "Give a man a URL, and he will learn for an hour; teach him > to Google, and he will learn for a lifetime." > > HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ > http://incolor.inetnebr.com/jshorney > http://www.nebraskaghosts.org > > > > _______________________________________________ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist > _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
