Dick,
You can buy a 1-2 ton chain fall hoist from harbor Freight for about
$40.00. One can mount this in the ceiling stationary by the hook, and
pull a pick up truck under it allowing the lift (if the ceiling is
high enough). It takes about the same amount of room as a come-a-long,
but is way easier to use. One can build some dollys to set the
equipment on and move it around the shop where ever you want.
Actually, One could mount the hoist outside to get it higher in the
air for a larger truck if you have a hard top or corcrete drive way to
roll the dolly on. They also make a set of wheels that riggers use to
move heavy machinery the same way. You can sometimes find them on ebay
at a cheap price.
If I was to use a hoist of any kind, I'd strongly recommend obtaining
a small I beam about 8 inches high at least, and set it atop two walls
to carry the load. Then mount the hoist to it. You can run these
between ceiling joists and set the ends on top of the sill plate. A
lot of the time, you can buy one cut new pretty cheap. A scrap yard is
another place to look. You only need one about the size that some
place over double-car garage doors in place of a header when they use
brick.
A luxury is to get is a small fork lift if you have a garage. Here,
they come in at the local two scrap yards all the time. To be honest,
there's not much wrong with some. A buddy of mine who owns a small
machine shop bought one from one of the yards that was electric and
they threw in a charger. I rebuilt the drive board and got it going. I
think he got it for $0.08 a pound which was $0.02 over what they paid.
I think it was one by Yale, however it was white in color. They are
very nice if your going to be doing a lot of heavy lifting. You can
mount a boom on the forks and you have a built in crane. I ran my
welding/repair portion of my machine shop with two lift trucks this
way.
Best,
Will
--- In ham_amplifiers@..., PA3DUV <pa3duv@...> wrote:
Lifting an 85lb transformer is not easy for this old fart.
I just put an M24 2 metric tonne lifting eye on a 1ft studbolt
through the steel reinforced concrete ceiling of my garage to get the
30 kVA 1500 rpm diesel genset and HT power supply on and off the
trailer. Using a chain come along even a physically challenged person
like the undersigned can do the job ;-)
Cheers, Dick
PA3DUV
----- Original Message -----
From: R L Measures
To: ham_amplifiers@...
Sent: Saturday, September 23, 2006 1:37 PM
Subject: Re: [ham_amplifiers] Re: HIGH SWR / HIGH REFLECTED POWER
SHUT DOWN CIRCUIT !!
On Sep 23, 2006, at 1:35 AM, pentalab wrote:
> --- In ham_amplifiers@..., PA3DUV <pa3duv@> wrote:
>>
>> Great info Jim!
>> NOW we're talking amplifiers ;-)
>>
>> This yahoo group has the possibility of posting pictures, files
and
> the like. Some pics of your "QRP" amps (They also make the usual
10
> kw 5 kw.. 2.5 kw qrp slugs.) would be very much appreciated.
>>
>> Thanks again for the very interesting contributions!
>>
>> Cheers, Dick
>> PA3DUV
>
> ### Tnx Dick..... As soon as I can figure out this pix posting
> deal... We will try and get some pix up.
>
> ### Just to set the record straight. I design this QRO stuff
> [including everything downstream like baluns, LC networks for
> stacked arrays, etc, for ... "clients" [who will remain
> nameless for obvious reasons]
>
> ### IMO.... I could care less how one gets their ERP. 1500w
> into stacked yagi's is... "OK".... but 5 kw into a dipole is
> a "no-no" ..gimme a break !
>
> ### These 1500-2000w amps just bore me to tears. IMO... it's
> just as easy to build a big one as a small one.
Lifting an 85lb transformer is not easy for this old fart.
> To me, it's an
> engineering challenge.
Indeed.
> ... since you will never read any... "how to
> build a 5-15 kw linear" in any ARRL hand book / QST article.
The laugher is that W1AW had an Alpha 2, 8877 amplifier until the
ARRL sold it to because it had a habit of zapping 8877s. The
purchaser of the amplifier, QST Editor Mark Wilson, installed a
low
VHF-Q parasitic suppressors and apparently put the amplifier to
good
use.
>
> ### When AES / RF Parts / Coaxial Dynamics tell me they
> sell 10 kw slugs like popcorn.... it's blatantly obvious this
> QRO scenario is, and always has been.. alive and well.
>
> ### Eimac tells me their is this... "secret world wide
> underground network of QRO amp bulders ".... so secret.. they
> don't even know each other !!
>
> ### For a laff... check out JA6TAY's site. He doesn't mess
about.
>
>
> ### Well, the cat's out of the bag now ! I fully intend to post
> as much of these "trade secrets" as I can. None of it is
> rocket science really.
Amen to that.
> It starts off as an engineering
> problem... reverts to a... "sizing issue" then back to an
> engineering issue.
>
> ### All as it amounts to is ... either using bigger
> components.... or doing stuff like paralleling 8 x 200pf @ 15
> kv HEC ceramic doorknobs to make a plate block cap assy.
With one or two thousand ohms of of RL, 1600pF is not necessary
for
the DC blocker cap at MF/HF.
>
...
cheers, Jim
R L MEASURES, AG6K. 805-386-3734
r@...
