🚀 go-pugleaf

In article <7an3kvkmp2sfteo1om0nus0nkiepq1mm2g@4ax.com>, 
void@nowhere.com says...
> On Sun, 17 Aug 2003 01:20:50 GMT, Active8
> <mcolasono@earthlink.net.invalid> wrote:
> 
> >In article <if7hjvgt4aaguuoghj5n088m707uls7m52@4ax.com>, 
> >void@nowhere.com says...
> >> On Sun, 10 Aug 2003 16:22:48 +0100, Paul Burridge
> >> <redscar@waitrose.notformail.com> wrote:
> >> 
> >> >On 10 Aug 2003 09:41:48 -0400, Sam Goldwasser <sam@saul.cis.upenn.edu>
> >> >wrote:
> >> >
> >> >>And the inductor is used how?  In series it will block the RF.  In parallel,
> >> >>it will still look like a high impedance for the fast rise time spike of
> >> >>a zap.
> >> >
> >> >Good point, Sam. So what's the definitive answer?
> >> 
> >> 1.5KE30CA (1500W 30V bidirectional Tranzorb). 
> >> Couple of bucks each.
> >> General Semiconductor.
> >> 
> >thanks. i've been thinking tranzorbs while reading all this and didn't 
> >know who made 'em.
> >
> >but those stun guns generate about 20kV. is the 30V spec above the 
> >voltage they turn on at?
> >
> >br,
> >mike
> 
> No. 

sorry, I meant "the above 30V spec", not the "30V spec above" :-)
i should have just left the "a" word out, but after a few days, it 
appears my grammatical error elicited a response.

hey. those GDTs are used to protect CATV amp ins/outs. those amps aren't 
cheap, so there must be something there. lower cost (?) and lower 
capacitance.

mike
> 
> That's the point. 
> 
> The transorb will clamp the 20KV to about 30V (actual clamp voltage
> depends upon the pulse rise time) protecting your circuit.
> 
> They have very low capacitance (10 to 15pF) and so should not affect
> your RF.
> 
> Another option is a GDT (gas discharge tube), even lower capacitance
> (only a couple of pF) and can be purchased in as low as 90V DC
> clamping voltages.
> 
> See: 
> 
> http://www.search.epcos.com/pls/prins/para_search.init?M_SPRACHID=2&M_PRFA=6&M_PGRP=PG_SA_2E
>