Re: Topband: beverage resistors at Mouser.com

[Jeff AC0C]

Yes.  They are cheap and I had no idea of what the lightning risk would be 
here.


I've had to do work on the active antennas a few times so I know ground 
level lighting currents are around.  But never had a problem with the 
beverage.  Maybe I'm just lucky.


73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-Original Message- 
From: Mike Waters

Sent: Monday, December 28, 2015 3:42 PM
To: Jeff AC0C
Cc: Jorge Diez CX6VM ; topband
Subject: Re: Topband: beverage resistors at Mouser.com

Jeff,

Do you mean six of the Ohmite type OY resistors in parallel?! I can
understand paralleling CF resistors, but just one of those OYs will take
quite a hit.

73, Mike
www.w0btu.com

On Mon, Dec 28, 2015 at 1:15 PM, Jeff AC0C  wrote:


If you are going to make the order, consider using several in parallel to
improve the surge handling capability.  I use 6x 2700 ohms here.

Those might work, although they might be inductive (but probably not
enough to matter at 160m) and might not have the surge rating that the
Ohmite OY resistors have. But I am not sure.

The ones below are the ones everyone uses. However, the 2W 470 ohm type OY
appear to be out of stock. The ones below should work fine.


588-OY-470-E <
http://www.mouser.com/ProductDetail/Ohmite/OY471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYs%252bchll6qvbU%3d
>

588-OY-390-E <
http://www.mouser.com/ProductDetail/Ohmite/OY391KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM9UfS4H1uSv96z622JnjmoY%3d
>

588-OX-470-E <
http://www.mouser.com/ProductDetail/Ohmite/OX471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYHfapLNvkuuU%3d
>



On Mon, Dec 28, 2015 at 11:31 AM, Jorge Diez CX6VM 
wrote:

I am looking for beverage resistors, I think 470 ohms 2 watts will be OK,
right?

In mouser.com I found 660-MOS2CT52R471J  and 660-MOS2C471J



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Re: Topband: beverage resistors at Mouser.com

[Jeff AC0C]

I have OY from Mouser.

Someone said the interested value was out of stock.  If you are going to 
ship to Spain, then get the right type (OY) and just pick a higher value 
where the parallel combo will give you the value you want.  Easy solution 
for the incremental cost over what would be a high shipping bill is 
essentially zero.


73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-Original Message- 
From: Tom W8JI

Sent: Monday, December 28, 2015 4:13 PM
To: Jeff AC0C ; Jorge Diez CX6VM
Cc: 'topband'
Subject: Re: Topband: beverage resistors at Mouser.com

If you are going to make the order, consider using several in parallel to 
improve the surge handling capability.  I use 6x 2700 ohms here.


73/jeff/ac0c


Be real careful with the resistor choice.

A metal oxide or film resistor handles many times less surge than an OX or
OY resistor. OX and OY resistors are 14kV and 20 kV pulse rated respectively
without damage, and handle (OX) 40 and (OY) 70 watt-seconds for 100 pulses
of 1 second at 50% duty.

A standard metal oxide is not remotely close, and paralleling 10 will not
get them close. Even better MOX are only 10 watt-seconds, and not remotely
close to the peak pulse voltage (which will not increase when they are
parallel).

I've never actually had a single OY resistor used in a termination burn out
from lightning, despite some pretty hard hits.  MOX are a different story
entirely.

Either type works fine so far as reactance goes, unless the application is
reactance critical. For a Beverage, reactance of either is not an issue. 


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Re: Topband: beverage resistors at Mouser.com

[Tom W8JI]

If you are going to make the order, consider using several in parallel to 
improve the surge handling capability.  I use 6x 2700 ohms here.


73/jeff/ac0c


Be real careful with the resistor choice.

A metal oxide or film resistor handles many times less surge than an OX or 
OY resistor. OX and OY resistors are 14kV and 20 kV pulse rated respectively 
without damage, and handle (OX) 40 and (OY) 70 watt-seconds for 100 pulses 
of 1 second at 50% duty.


A standard metal oxide is not remotely close, and paralleling 10 will not 
get them close. Even better MOX are only 10 watt-seconds, and not remotely 
close to the peak pulse voltage (which will not increase when they are 
parallel).


I've never actually had a single OY resistor used in a termination burn out 
from lightning, despite some pretty hard hits.  MOX are a different story 
entirely.


Either type works fine so far as reactance goes, unless the application is 
reactance critical. For a Beverage, reactance of either is not an issue. 


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Re: Topband: beverage resistors at Mouser.com

[Mike Waters]

Jeff,

Do you mean six of the Ohmite type OY resistors in parallel?! I can
understand paralleling CF resistors, but just one of those OYs will take
quite a hit.

73, Mike
www.w0btu.com

On Mon, Dec 28, 2015 at 1:15 PM, Jeff AC0C  wrote:

> If you are going to make the order, consider using several in parallel to
> improve the surge handling capability.  I use 6x 2700 ohms here.
>
> Those might work, although they might be inductive (but probably not
> enough to matter at 160m) and might not have the surge rating that the
> Ohmite OY resistors have. But I am not sure.
>
> The ones below are the ones everyone uses. However, the 2W 470 ohm type OY
> appear to be out of stock. The ones below should work fine.
>
>
> 588-OY-470-E <
> http://www.mouser.com/ProductDetail/Ohmite/OY471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYs%252bchll6qvbU%3d
> >
>
> 588-OY-390-E <
> http://www.mouser.com/ProductDetail/Ohmite/OY391KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM9UfS4H1uSv96z622JnjmoY%3d
> >
>
> 588-OX-470-E <
> http://www.mouser.com/ProductDetail/Ohmite/OX471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYHfapLNvkuuU%3d
> >
>
>
>
> On Mon, Dec 28, 2015 at 11:31 AM, Jorge Diez CX6VM 
> wrote:
>
> I am looking for beverage resistors, I think 470 ohms 2 watts will be OK,
> right?
>
> In mouser.com I found 660-MOS2CT52R471J  and 660-MOS2C471J
>
>
_
Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: beverage resistors at Mouser.com

[Jeff AC0C]

If you are going to make the order, consider using several in parallel to 
improve the surge handling capability.  I use 6x 2700 ohms here.


73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-Original Message- 
From: Jorge Diez CX6VM

Sent: Monday, December 28, 2015 12:53 PM
Cc: 'topband'
Subject: Re: Topband: beverage resistors at Mouser.com

Thanks all for the help, very useful information



Happy New Year!



73,

Jorge

CX6VM/CW5W



De: Mike Waters [mailto:mikew...@gmail.com]
Enviado el: lunes, 28 de diciembre de 2015 03:15 p.m.
Para: Jorge Diez CX6VM
CC: topband
Asunto: Re: Topband: beverage resistors at Mouser.com



Jorge,

Those might work, although they might be inductive (but probably not enough 
to matter at 160m) and might not have the surge rating that the Ohmite OY 
resistors have. But I am not sure.


The ones below are the ones everyone uses. However, the 2W 470 ohm type OY 
appear to be out of stock. The ones below should work fine.



588-OY-470-E 
<http://www.mouser.com/ProductDetail/Ohmite/OY471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYs%252bchll6qvbU%3d>


588-OY-390-E 
<http://www.mouser.com/ProductDetail/Ohmite/OY391KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM9UfS4H1uSv96z622JnjmoY%3d>


588-OX-470-E 
<http://www.mouser.com/ProductDetail/Ohmite/OX471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYHfapLNvkuuU%3d>


73, Mike

www.w0btu.com



On Mon, Dec 28, 2015 at 11:31 AM, Jorge Diez CX6VM  
wrote:


I am looking for beverage resistors, I think 470 ohms 2 watts will be OK, 
right?


In mouser.com I found 660-MOS2CT52R471J  and 660-MOS2C471J

Which one is better? Or maybe another part number that you know?





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Re: Topband: beverage resistors at Mouser.com

[Jorge Diez CX6VM]

Thanks all for the help, very useful information

 

Happy New Year!

 

73,

Jorge

CX6VM/CW5W

 

De: Mike Waters [mailto:mikew...@gmail.com] 
Enviado el: lunes, 28 de diciembre de 2015 03:15 p.m.
Para: Jorge Diez CX6VM
CC: topband
Asunto: Re: Topband: beverage resistors at Mouser.com

 

Jorge,

Those might work, although they might be inductive (but probably not enough to 
matter at 160m) and might not have the surge rating that the Ohmite OY 
resistors have. But I am not sure.

The ones below are the ones everyone uses. However, the 2W 470 ohm type OY 
appear to be out of stock. The ones below should work fine. 


588-OY-470-E 
<http://www.mouser.com/ProductDetail/Ohmite/OY471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYs%252bchll6qvbU%3d>
 

588-OY-390-E 
<http://www.mouser.com/ProductDetail/Ohmite/OY391KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM9UfS4H1uSv96z622JnjmoY%3d>
 

588-OX-470-E 
<http://www.mouser.com/ProductDetail/Ohmite/OX471KE/?qs=sGAEpiMZZMvmQ%252bOLa8n%2fM0AL619UxluYHfapLNvkuuU%3d>
 

73, Mike

www.w0btu.com

 

On Mon, Dec 28, 2015 at 11:31 AM, Jorge Diez CX6VM  
wrote:

I am looking for beverage resistors, I think 470 ohms 2 watts will be OK, right?

In mouser.com I found 660-MOS2CT52R471J  and 660-MOS2C471J

Which one is better? Or maybe another part number that you know?

 



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Re: Topband: beverage resistors at Mouser.com

[Mike Waters]

Jorge,

Those might work, although they *might* be inductive (but probably not
enough to matter at 160m) and *might* not have the surge rating that the
Ohmite OY resistors have. But I am not sure.

The ones below are the ones everyone uses. However, the 2W 470 ohm type OY
appear to be out of stock. The ones below should work fine.

588-OY-470-E


588-OY-390-E


588-OX-470-E


73, Mike
www.w0btu.com

On Mon, Dec 28, 2015 at 11:31 AM, Jorge Diez CX6VM 
wrote:

> I am looking for beverage resistors, I think 470 ohms 2 watts will be OK,
> right?
>
> In mouser.com I found 660-MOS2CT52R471J  and 660-MOS2C471J
>
> Which one is better? Or maybe another part number that you know?
>
_
Topband Reflector Archives - http://www.contesting.com/_topband

Topband: beverage resistors at Mouser.com

[Jorge Diez CX6VM]

Hello

 

I am looking for beverage resistors, I think 470 ohms 2 watts will be OK,
right?

 

In mouser.com I found 

 

660-MOS2CT52R471J  and 660-MOS2C471J

 

Wich one is better? Or maybe another part number that you know?

 

Thanks,

Jorge

CX6VM/CW5W



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