[Amps] SHV connectors great, but where to find coax?

[Jim Thomson]

Date: Sat, 11 Sep 2010 08:35:48 EDT
From: TexasRF at aol.com
Subject: Re: [Amps] SHV connectors great, but where to find coax?

Dave and all, the last SHV connectors I purchased were from Pasterrnak, the 
 high priced specialist folks.
 
They have SHV cable and mating chassis connectors for RG213/U coax. II  
wanted the security of extra voltage handling because of around 10 KV used in a 
 twt power supply.
 
The coax connectors were about $25 and the chassis connectors were about  
$15.
 
They worked out really well and I will never use any other type of hv  
connector on future projects.
 
A three inch length of heat shrink was installed on the cable ends for  
reinforcement and added mechanical security for the coax shields. This is a  
cheap and effective way to add protection in a critical for safety  location.
 
I have wondered if adding a dab of silicone grease to the center pin to  
coax dielectric area before connector assembly might be a good idea to 
eliminate  air gaps and moisture traps. Any opinions on that?
 
73,
Gerald K5GW

##  I looked up SHV on wikipedia... and it sez  a SHV is only good for 
3500 v rms ... so add 41% = 5 kv dc.   They also say there  are higher 
voltage.   I looked and couldn't find anything from anybody...that was more
than 5 kv.    This version you found from pasternack.... other than it takes
213u size coax... does the mating female chassis  connector + 213-U size
male..rated for 10kv ??  

##  one could also probably use use RG-393  teflon coax.   It's a tiny bit
smaller than 213.   [.390"  vs  .405"]   RG-393 is solid teflon dielectric... and is
probably overkill... but I have loads of it. 

##  I just may have finally found a HV connector I like... provided it handles
8 kvdc..safely.   I gave up on Aldens, Millens etc.  I then just hardwired the B+
at both ends..with sta-kon crimp connectors [also soldered]... and machine screws.
Takes awhile to get apart though. 

##  Is pasternack the only ones who carry  RG-213 size  SHV male connectors ? 
Is the chassis female a regular  SHV chassis connector... or a special  10 KV
rated one ??  

Tnx........ Jim   VE7RF