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



I certainly wish I had the 230 vac option to wire my HT-33A!  It would have precluded the need to run a 10 ga. electrical "home run" to my beaker box!
 
Jack  W3RU
 
> From: k6xyz@xxxxxxxxxxxxx
> To: collins@xxxxxxxxxxxxx
> Date: Sat, 8 Nov 2014 00:48:01 -0600
> Subject: Re: {Collins} [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115V	and 230V
> 
> The line voltage regulation is much better when operating on 220vac.
> The amp output is more stable and the rectified voltages of the PA and bias
> supplies are not wiggling all over the place.
> I think all transmitters in the 500 watt and higher output class should be
> on 220vac.
> 
> 
> 
> 73
> 
> David Harmon
> K6XYZ
> Sperry, OK
> 
> -----Original Message-----
> From: Collins [mailto:collins-bounces+k6xyz=sbcglobal.net@xxxxxxxxxxxxx] On
> Behalf Of John Duffield
> Sent: Saturday, November 8, 2014 12:31 AM
> To: collins@xxxxxxxxxxxxx
> Subject: Re: {Collins} [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115V
> and 230V
> 
> Hey, Dave - it might be a little more complete to mention to Stan that 4
> amps of current from a 240 volt source is exactly the same amount of power
> (watts) thru the transformer as 8 amps of current from a 120 volt source.
> The arithmetic proves the case... Watts = E volts X I current.
> 
> Now... if you want to talk about voltage loss through the power cords and
> connectors and 90 feet to the breaker box.... that might be a productive
> discussion, but the amplifier performance at the transformer is identical in
> both cases.  The power is not dissipated in the power 
> supply transformer, of course....   the filaments get hot, and the 
> antenna gets RF power... Fun discussion !!
> 
> John
> K0KHZ
> 
> On 11/7/2014 8:56 PM, Dave wrote:
> > 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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