Topband: Resistors 470 ohm 2 watt

[HAROLD SMITH JR]

If one would look on eBay there are quite a few 470 ohm 2 watt Allen Bradley 
Carbon Resistors. They are non inductive and perfect for terminating an 
antenna. 73 Price  W0RI
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 470 non carbon resistor

[Petr Ourednik]

Stein

In US:
Carbon resistors 470/2W here - mouser.com
Cores here - kitsandparts.com

...I bought them here too.

73 - Petr, OK1RP


On Wed, Apr 13, 2016, at 03:29 PM, K3RAG LB3RE Brobakken wrote:
> 
> 
> Hello
> 
> Where do you buy stuff for beverage like 470 ohm non carb resistor for
> terminating and cores for 9:1 in US ?
> 
> 
> 73s Rag
> Stein-Roar LB3RE
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 470 non carbon resistor

[Tim Shoppa]

"Metal" or "Ceramic" composition resistor. Maybe Farnell would be ok place
to buy from in Europe?

http://www.dxengineering.com/parts/dxe-ecm-r470-2

http://www.newark.com/ohmite/oy471ke/resistor-ceramic-470-ohm-2w-10/dp/64K5431

http://uk.farnell.com/ohmite/oy471ke/resistor-ceramic-2w-470r/dp/1462390

Tim N3QE



On Wed, Apr 13, 2016 at 9:29 AM, K3RAG LB3RE Brobakken 
wrote:

>
>
> Hello
>
> Where do you buy stuff for beverage like 470 ohm non carb resistor for
> terminating and cores for 9:1 in US ?
>
>
> 73s Rag
> Stein-Roar LB3RE
> _
> Topband Reflector Archives - http://www.contesting.com/_topband
>
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 470 non carbon resistor

[Paul Christensen]

> "Where do you buy stuff for beverage like 470 ohm non carb resistor for
terminating and cores for 9:1 in US ?"

Ohmite and IRC/TT still manufacture non-L, carbon composition resistors.  If
there's a reason to avoid carbon composition, Ohmite and KOA manufactures
ceramic composition resistors in their OX (1-watt)/OY (2-watt) product line.
In the U.S., these resistors are available from Mouser, Digikey,
Newark/Element 14, Allied, and Arrow Express.

Regarding toroid cores, W0BTU has assembled a nice compendium of data on the
subject.  In particular, see the postscript written by Barry, N1EU:

http://www.w0btu.com/files/beverage/BeverageXfmrs.htm

Paul, W9AC

_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 470 non carbon resistor

[Mike Waters]

Those are likely Ohmite type OY 2 watt ceramic/metal composition resistors.
They are non-inductive and are the preferred choice for Beverage
terminations. They will survive higher surge currents from nearby lightning
strikes than carbon composition.

http://www.ohmite.com/catalog/pdf/ox_oy_series.pdf
Mouser Electronics # 588-OY-470-E

The cores are Fair-Rite # 2873000202 (Amidon BN-73-202). Newark/Farnell has
them, I believe.

73, Mike
www.w0btu.com

On Wed, Apr 13, 2016 at 9:10 AM, william radice  wrote:

>  A carbon resistor is what you need, NOT a non-carbon. You can get
> them here...among other places. Not real hard to find
> http://www.dxengineering.com/parts/dxe-ecm-r470-2
>
>
> On 4/13/2016 9:29 AM, K3RAG LB3RE Brobakken wrote:
> > Where do you buy stuff for beverage like 470 ohm non carb resistor for
> terminating and cores for 9:1 in US ?
>
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: 470 non carbon resistor

[william radice]

 A carbon resistor is what you need, NOT a non-carbon.
You can get them here...among other places. Not real hard to find
http://www.dxengineering.com/parts/dxe-ecm-r470-2
BILL

On 4/13/2016 9:29 AM, K3RAG LB3RE Brobakken wrote:
>
> Hello
>
> Where do you buy stuff for beverage like 470 ohm non carb resistor for 
> terminating and cores for 9:1 in US ?
>
>
> 73s Rag
> Stein-Roar LB3RE
> _
> Topband Reflector Archives - http://www.contesting.com/_topband

_
Topband Reflector Archives - http://www.contesting.com/_topband

Topband: Under the FWIW

[Craig Clark]

In 1974, I was commissioned as a US Army 2Lt and assigned to the Signal
Corps.
After summer break, I reported to Ft Gordon for Signal Basic training. Among
the many disciplines
we covered was how to teach a class. I decided to do a class on radio waves
and how they propagate.
After a Chalkboard presentation describing propagation, I used a small HF
transmitter and fluorescent light
To prove the existence of "radio waves" to the class. 

I was the only one in the class with a ham license and one of two who knew
and could use Morse code
to communicate. The second class I did was demonstrate "binary
communications" with a older LT from Cambodia.

Enough of my nostalgia.   

Craig K1QX

PS For those who were in the Army, the TAMMS 38-750, The Army Maintenance
Management System, was the most BORING class at Gordon 

_
Topband Reflector Archives - http://www.contesting.com/_topband