Digest for sci.electronics.repair@googlegroups.com - 7 updates in 4 topics

Ralph Mowery <rmowery28146@earthlink.net>: Sep 30 06:32PM -0400

In article <polukp$g9$1@dont-email.me>, bashley101@gmail.com says...
> need a huge quantity of hot water at any one time and the tankless ones
> seem cheaper than the normal ones which eventually solidify with SoCal
> hard-water crap.
 
Being in SoCal may be somewhat different from other parts of the
country.
 
Check the price of doing all the piping to get the gas to the water
heater. It takes lots of gas for a short period of time instead of
small ammounts for longer time.
 
Check how long the different ones last and how much they cost and if you
can replace them yourself or need a pro to do it.
jurb6006@gmail.com: Sep 30 04:59PM -0700

>"It takes lots of gas for a short period of time instead of
small ammounts for longer time. "
 
They want a 1" gas line all the way to the meter.
 
>"Check how long the different ones last and how much they cost and if you
can replace them yourself or need a pro to do it. "
 
That's a biggie these days when many people don't know how to change a flat tire. Anything with gas make sure you know what you're doing or you might go out in the proverbial blaze of glory.
 
Most cities will tell you you need a licensed pro and a permit, but that is incorrect. Still, if you do it yourself you can have it inspected, most places. But if in Kalifornia laws mean nothing. Liberal whims rule. So basically if you decide to do it on your own, don't even talk to them. Don't get into that legal battle. I am not afraid of it but I won't send anyone else in for that. Just keep your mouth shut about it.
 
If you are incapable of doing it, the best bet is to find the local plumber's union hall and find one who is in between jobs. You'll pay their rate of course, but you won't have to also pay a guy in an expensive suit to sit on his ass.
The Real Bev <bashley101@gmail.com>: Sep 30 08:35PM -0700

>> "It takes lots of gas for a short period of time instead of
> small ammounts for longer time. "
 
> They want a 1" gas line all the way to the meter.
 
That is probably the biggest problem and the thing that kills the project.
 
 
> That's a biggie these days when many people don't know how to change
> a flat tire. Anything with gas make sure you know what you're doing
> or you might go out in the proverbial blaze of glory.
 
We've installed 2 tankful gas water heaters before.
 
> don't even talk to them. Don't get into that legal battle. I am not
> afraid of it but I won't send anyone else in for that. Just keep
> your mouth shut about it.
 
:-)
 
> plumber's union hall and find one who is in between jobs. You'll pay
> their rate of course, but you won't have to also pay a guy in an
> expensive suit to sit on his ass.
 
We'll see. Maybe it's just a simple thing -- the water heater
equivalent of banging on the side with a wrench. All pigs fed and ready
to fly.
 
--
Cheers, Bev
"Screw the end users. If they want good software,
let them write it themselves." -- Anon.
"pfjw@aol.com" <peterwieck33@gmail.com>: Oct 01 05:02AM -0700

On the 1" line to the meter - it ain't necessarily so. The size of the line is dependent on the size of the heater, the distance from the meter, and the gas pressure. Keep in mind that the typical tankless heater uses somewhere between 150,000 BTUH and 250,000 BTUH.
 
One cubic foot of gas is 1,010 BTU - use 1,000.
 
You will need between 150 and 250 cubic feet of gas per hour. That is 2.5 - 4.2 cf/minute.
 
https://www.engineeringtoolbox.com/natural-gas-pipe-sizing-d_826.html Will help you size the needed pipe.
 
There is also flexible piping these days that is a breeze to install (unless you are a expert, amend that a breeze for *someone else* to install), and around here, the gas utility will do a certain amount of internal work if you are installing a new appliance.
 
If the only gas you burn is to make hot water, you are absolutely correct that the payback will be beyond your expected lifetime. In a full-time residence, storage-losses are insignificant, use is constant, and the relative difference in installed cost between an instant and a conventional tank-storage heater (3:1) blows up the financial advantages. For our summer house, the use patterns are quite different, the house is at the end of a long dirt 'lane', making propane delivery inconvenient (we get an annual delivery along with a tank inspection), so reducing use and storage losses is important. That a tankless is +/- 28% more efficient than even the best storage-type heaters, and takes up almost no space are additional advantages applicable in a small summer house.
 
Peter Wieck
Melrose Park, PA
"~misfit~" <shaun.at.pukekohe@gmail.com>: Oct 01 09:50PM +1300

Once upon a time on usenet John Robertson wrote:
 
> https://www.nmr.mgh.harvard.edu/~reese/electrolytics/
 
> Heathkit made a great cap checker that we use to check older off the
> shelf NOS caps. Has the Magic-Eye tube and everything - except ESR.
 
Thanks for that link.
--
Shaun.
 
"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)
"~misfit~" <shaun.at.pukekohe@gmail.com>: Oct 01 09:07PM +1300

Once upon a time on usenet J.B. Wood wrote:
> peat essence to be had in Sam Adams' Scotch Ale as well. I screwed
> up - I should have said "Scottish" vice "Scotch". OK, back on topic.
> Sincerely,
 
Dammit now I'm going to have to pull the cork on my bottle of a'bunadh and
pour a dram.
--
Shaun.
 
"Humans will have advanced a long, long way when religious belief has a cozy
little classification in the DSM*."
David Melville (in r.a.s.f1)
(*Diagnostic and Statistical Manual of Mental Disorders)
Krister James Corsino <kjcorsino5@gmail.com>: Sep 30 09:59AM -0700

Can you send me a solution manual of Albert Malvino 8th edition Electronic Principle
thanks
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