Perhaps, but the power supply is not the only thing that can draw power from the IEC connector. There's a 10A fuse in series with the PS input.
Bob M. ====== --- Jay Urish <[EMAIL PROTECTED]> wrote: > I was about to say... > > Look at the wires coming out of the connector > heading to the power > supply. They are 16ga. > > an 8ga power cord is 100% beyond overkill. > > Bob M. wrote: > > > > > > Some real numbers. A 110W UHF repeater > C74CXB7107BT > > with internal filter/duplexer, producing 60 watts > into > > a dummy load at 122VAC input. RX squelched up, no > > other accessories, options, or fans. > > > > RX: 0.61A, 60W, 74VA, PF=0.80 > > TX: 4.00A, 452W, 487VA, PF=0.92 > > > > 60 RF output watts at the duplex antenna connector > for > > 480 AC input watts is a whopping 12.5% efficiency. > I > > think the 8A rating would be adequate if the > station > > had more options and fans. > > > > Measurements made with a "Kill-A-Watt" device. The > 6A > > value quoted below was measured with a different > meter > > which was obvioiusly in error. > > > > Bob M. > > ====== > > --- Andrew <[EMAIL PROTECTED] > <mailto:kc2eus%40nycap.rr.com>> wrote: > > > > > Thanks for all the replys and I'll make sure I > have > > > the correct power > > > cord. > > > > > > Andrew > > > > > > --- In [email protected] > > <mailto:Repeater-Builder%40yahoogroups.com>, Mike > Morris > > > WA6ILQ > > > <[EMAIL PROTECTED]> wrote: > > > > > > > > And while the MSFs have an IEC power > connector > > > > DO NOT use a wimpy computer power cord. > > > > Go to an industrial supplier and get a good > husky > > > > IEC power cord ( #8 wire if you can get it, > #10 if > > > > you can't, or #12 if it's a really short > run). > > > > > > > > I've seen a couple of MSFs where the owner > > > obviously > > > > could not locate a IEC cord with husky enough > wire > > > to > > > > satisfy him (not everyone has access to > big-city > > > > electrical supply houses). > > > > On those two units the IEC was removed and > > > replaced > > > > with a cut down piece of steel plate that > looked > > > almost > > > > like a piece of an outlet box blank cover > plate . > > > A three > > > > foot piece of three conductor #8 or #10 cable > hung > > > out > > > > of a grommet with a 3 conductor twist lock > plug on > > > the > > > > end. > > > > > > > > Mike WA6ILQ > > > > > > > > At 05:52 PM 11/13/07, you wrote: > > > > >That's a pretty good number. They use > > > ferro-resonant > > > > >power supplies which are notoriously > inefficient. > > > My > > > > >75w UHF station draws about 6 amps when > > > transmitting. > > > > >The 110w supply is rated for 625 watts > output, so > > > > >figure at best about 70% efficiency and > you're up > > > near > > > > >900 watts AC input. > > > > > > > > > >If you need an exact value, I can fire up a > > > station > > > > >and measure it. > > > > > > > > > >Best place for one of these stations is at a > site > > > > >where YOU do NOT have to pay for the > electricity > > > ! > > > > > > > > > >Bob M. > > > > >====== > > > > >--- Andrew <[EMAIL PROTECTED]> wrote: > > > > > > > > > > > Hi, > > > > > > Does anyone happen to know the current > draw on > > > > > > transmit of a 100W UHF > > > > > > Moto MSF5000. > > > > > > The VA rating on the sticker calculates > out to > > > > > > around 8A. I just want > > > > > > to be sure before I go plugging it in and > > > tripping a > > > > > > circuit. > > > > > > > > > > > > Thanks > > > > > > Andrew > > > > > > KC2EUS / GM1YMI > > > > > __________________________________________________________ > > Be a better pen pal. > > Text or chat with friends inside Yahoo! Mail. See > how. > > http://overview.mail.yahoo.com/ > <http://overview.mail.yahoo.com/> > > > > > > -- > Jay Urish W5GM ex. KB5VPS > > ARRL Life Member Denton County ARRL VEC > N5ERS VP/Trustee > > Monitoring 444.850 PL-88.5 146.92 PL-110.9 ____________________________________________________________________________________ Be a better sports nut! Let your teams follow you with Yahoo Mobile. Try it now. http://mobile.yahoo.com/sports;_ylt=At9_qDKvtAbMuh1G1SQtBI7ntAcJ
