I tried the AF transformer but never got it to work well. A buck boost is a transformer that can be wired either way giving in my case 120 volts to 6 volts. I could have done it backwards and gone 120 volts to 2400 volts but it would have reduced total current capacity to about .25 amp.
I have had this unit almost 30 years but I got it locally at an electric supply outfit. Not much internet back in the early 80's. Now days you can probably get it cheap on line but the shipping may kill you. It weighs a ton. Quick search gives http://www.solahd.com/products/transformers/buckboost/Specification.htm but they don't list a 6 volt. Carey Carey Probst Member, M.I.T. Educational Council S Scale, Sn3 and S High Rail/AF A well regulated militia being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed. On 5/4/2011 1:04 PM, shabbona_rr wrote: > > If I'm applying the formula for converting watts to amps correct, the > 175-Watt dual transformer I bought should be putting out 5.8+ amps on > each side @15 volts (175W divided by 2 divided by 15) on the output > side. Are you saying that if I use the variable voltage post I will > raise the amperage as I reduce the voltage? > > My knowledge of these things has a thick coat of corrosion and rust > from years of non-use. Any enlightenment will be welcome. > > Gary, where did you buy your buck transformer? That is another term > and item about which I am hazy. > > Bob Nicholson _________________________________________ > > --- In [email protected] <mailto:S-Scale%40yahoogroups.com>, > Carey Probst <s-scale@...> wrote: > > > > I used a 0.5 KVA 6 volt buck boost transformer and a rheostat to > control > > voltage. > > > > It will put out 90 amps at 6 volts for large items and with the > rheostat > > can be throttled down to under a volt for small items to avoid > > vaporizing them. I added an inline voltmeter so I could see how much > > power I was using after vaporizing a part and getting a lecture from > the > > guy at S Scale Loco Supply a while back. > > > > Always start low and add power to avoid my mistake. > > > > Carey > > > > Carey Probst > > > > Member, M.I.T. Educational Council > > > > S Scale, Sn3 and S High Rail/AF > > > > A well regulated militia being necessary to the security of a free > State, > > > > the right of the people to keep and bear arms shall not be infringed. > > > > > > On 5/4/2011 8:55 AM, shabbona_rr wrote: > > > > > > A while back, I built a resistance soldering unit per some > information > > > I had on the subject. While it worked using a pencil lead with an AF > > > 50-Watt transformer, the 50-Watts was not powerful enough to make it > > > work with a carbon welding rod. > > > > > > Over the weekend, I picked up a dual throttle AF 18B 175-Watt > > > transformer, which I assume works out to 87.5-Watts for each > throttle. > > > While it appears to be capable of doing the job, all it really > does is > > > trip the circuit breaker. > > > > > > Two questions: > > > > > > 1. - Can I connect the two sides in parallel for more power and less > > > strain on the circuit breakers? > > > > > > 2. - What else am I doing wrong? > > > > > > Bob Nicholson ____________________________________________ > > > > > > > > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
