Re: {Collins} Fw: [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115Vand 230V



My understanding is the loss in a piece of wire due from electricity flowing thru it is I squared R. Since the wire in a transformer is fixed -- size, length, all that -- the resistance will be whatever it is and not change due to the voltage flowing thru it. So if the loss is I squared R and the R is fixed then less I means less loss (aka less heat). Half the current flow should mean a quarter of the loss.

Not Collins but life/electrical in general ............. high voltage lines in the power distribution grid are high voltage to reduce loss in them. High current devices in your home like stoves and dryers are 220 volt for the same reason -- allows smaller gage wiring.

John  W4FID



----- Original Message ----- From: "Stanley M Miln" <k6rmr@xxxxxxxxxxx>
To: <COLLINS@xxxxxxxxxxxxx>
Sent: Saturday, November 08, 2014 3:42 PM
Subject: {Collins} Fw: [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115Vand 230V




4A x 230v = 920 watts
8A x 115v = 920 watts

Duh...

I don't care when or where you went to school....
You can't be this ignorant.


73

David Harmon
K6XYZ
Sperry, OK

-----Original Message-----
From: Stanley M Miln [mailto:k6rmr@xxxxxxxxxxx]
Sent: Saturday, November 8, 2014 2:15 PM
To: David Harmon
Subject: Re: [Bulk] Re: {Collins} [Bulk] Re: 30L-1 - convert between 115V
and 230V

 Hi Dave
The Current in a wire is the same as Water going down a hose. The Voltage
is the Water,(Pressure) and the  Current is like the water,  what goes
through the hose. There is less Voltage drop in the Power cord at 240 and
less  Heat generated.
This is Basic Electronic Theory. When I went to Electronic School 50 Years
ago , we Learned this  the first day of School.
                 Stan K6RMR


But there is twice the voltage so the wattage is the same....duh


73

David Harmon
K6XYZ
Sperry, OK

-----Original Message-----
From: Stanley M Miln [mailto:k6rmr@xxxxxxxxxxx]
Sent: Saturday, November 8, 2014 1:54 PM
To: Dave; 'David Harmon'; 'Rick Poole WA1RKT'; 'collins'
Subject: Re: [Bulk] Re: {Collins} [Bulk] Re: 30L-1 - convert between
115V and 230V

 Current draw is what heats up the Transformer and  the power supply
not the Voltage. There is half the  current going down the power cord
on 240 Volts.
             Stan K6RMR

Watts are watts no difference in  heat dissipated in power supply
transformer.  Primary windings are in either series or parallel in
the same transformer.  The iron doesn't know the difference.

-----Original Message-----
From: Stanley M Miln [mailto:k6rmr@xxxxxxxxxxx]
Sent: Friday, November 07, 2014 7:44 PM
To: Dave; 'David Harmon'; 'Rick Poole WA1RKT'; 'collins'
Subject: [Bulk] Re: {Collins} [Bulk] Re: 30L-1 - convert between 115V
and 230V

 Hi Dave
One good thing about running the 30L1 on 240Volts  is you only pull
about
4
amps on the AC in instead  of 8 Amps. That would generate less heat
in the Power Supply.
                   Stan K6RMR

It is my understanding that stock 30L1 amps came from the factory
wired for
120 volts.  (or maybe a little lower back then).  I have had them
wired both ways and have had identical performance.  Rewiring the
terminal strip[ is touchy since it gets fragile with age.  Also,
some of the AC distributing experts out there have issues with the
Collins
240 volt setup which I don't totally understand,  something about
line balance. When I had the shack wired for 240 I added a 120v 20
amp line direct to the panel.  That is where my current 30L1 lives
happily.
Dave
W7VM
-----Original Message-----
From: Collins
[mailto:collins-bounces+d.gow=frontier.com@xxxxxxxxxxxxx] On Behalf
Of David Harmon
Sent: Friday, November 07, 2014 3:33 PM
To: 'Rick Poole WA1RKT'; 'collins'
Subject: [Bulk] Re: {Collins} 30L-1 - convert between 115V and 230V
Importance: High

Rick....there is a service bulletin pertaining to ensuring that the
fuse holders are wired correctly....see the CCA website.
Also....with the unit upside down looking toward the front....the
terminal strip counts R/L...opposite to what you might think.
Follow the rig manual to make the changes on the TS.


73

David Harmon
K6XYZ
Sperry, OK

-----Original Message-----
From: Collins
[mailto:collins-bounces+k6xyz=sbcglobal.net@xxxxxxxxxxxxx]
On
Behalf Of Rick Poole WA1RKT
Sent: Friday, November 7, 2014 5:26 PM
To: collins
Subject: {Collins} 30L-1 - convert between 115V and 230V

I have three 30L-1 amps, two wired for 115V and one wired for 230V.
I can discern absolutely no difference in the performance, and it'll
be more convenient if all three are wired for 115V, so I'm
converting the
230 back to 115.

I have this vague recollection that there was more to the conversion
to
230
than just changing the jumpers on the power strip.  Someone on one
of these reflectors had come up with a recommendation to do X in
order to prevent some bad thing from happening.  But, I can't find,
or remember, the details.

Ring any bells with anyone?

Rick WA1RKT
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