Topband: RClamp2502L

[Martin Kratoska]

datasheet here
http://www.ok1rr.com/files/rclamp2502l.pdf

73,
Martin, OK1RR

Dne 11. 10. 19 v 15:17 Martin Kratoska napsal(a):
> I did quite lot of research about protective limiters. The best solution 
> found is to use the special TVS diodes RClamp2502L by Semtech which 
> incorporate surge rated, low capacitance steering diodes and a TVS diode 
> in a single package. During transient conditions, the steering diodes 
> direct the transient current away from the protected input. The internal 
> TVS diode clamps the transient voltage to a safe level. The low 
> capacitance array configuration allows the user to protect up to two
> high-speed data lines.
> 
> RClamp2502L can be used directly "in-line", no additional components 
> needed. A new type of "RX front end saver" with Semtech's RClamp2502L is 
> in preparation.
> 
> 73,
> Martin, OK1RR
> 
> Dne 11. 10. 19 v 13:49 N4ZR napsal(a):
>> Array Solutions no longer handles the K9AY components, which actually 
>> came from K9RU's Wolf RF Systems.  It looks like the ICE limiter is 
>> still out there, and reasonably priced, but I have no idea whether 
>> it's a good design - it's pretty old - or just a pair of diodes back 
>> to back.
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> On 10/10/2019 10:08 PM, Alan Swinger wrote:
>>> I use a Model 197 RF Limiter/Arrestor by Industrial Comms Engineers 
>>> for my K9AY Loop. I think I got it from DX Eng ~ 10 yrs ago, but also 
>>> chk w/ Array Solutions since I think they now handle the K9AY Loop. - 
>>> Alan K9MBQ
>>>
>>>
>>> -----Original Message-----
>>>> From: N4ZR <n4zr at comcast.net>
>>>> Sent: Oct 10, 2019 9:30 PM
>>>> To: topband reflector <Topband at contesting.com>
>>>> Subject: Topband: Protecting an Array Solutions K9AY Loop from 
>>>> Transmitted RF
>>>>
>>>> I'm in the process of building up a K9AY loop, using the Array 
>>>> Solutions
>>>> boxes, and it occurred to me that I probably need to work out some way
>>>> to protect the preamp in the shack-end box from transmitted RF,
>>>> particularly since the K9AY loop is only about 60 feet from the 
>>>> vertical
>>>> leg of my inverted L and I'll be running 1500 watts.
>>>>
>>>> I can see maybe cutting off the DC to the preamp, but figure that won't
>>>> be enough. Alternatively, I can probably work out a way to either open
>>>> or short the feedline coming into the indoor box where the preamp is.
>>>> Any advice as to which would be best (opening or shorting)?  I only 
>>>> have
>>>> one spare transistor.
>>>>
>>>> Advice much appreciated
>>>>
>>>> -- 
>>>>
>>>> 73, Pete N4ZR
>>>> Check out the Reverse Beacon Network
>>>> at <http://reversebeacon.net>, now
>>>> spotting RTTY activity worldwide.
>>>> For spots, please use your favorite
>>>> "retail" DX cluster.
>>>>
>>>> _________________
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