That is why the 500 or 1000 ohm resistors and/or back to back diodes are
important. If the B minus and B plus connections are made via grounded SHV
connectors with coaxial cables, there would be no danger of a floating
chassis. A loose shield would be problematic but that is another issue.
People can do strange things to hurt themselves at times. I have seen
radios with N connector jacks ruined because someone screwed a PL259 onto the N
jack. At least in this case they only hurt their wallet.
You are correct about not being able to connect SHV connectors to a BNC
jack. The shield will connect, but not the inner conductor. There is a UHV
connector as well, with an even different internal length.
73 de K5GW
In a message dated 9/10/2010 5:48:51 A.M. Central Daylight Time,
rezycle.bin@gmail.com writes:
Yes, that is an option. However if someone accidentically removes
Bminus connector before Bplus connector and the interchassis ground
strip has been disconnected or has a bad connection, the whole RF deck
could rest at Bpluss. I would like a bullet proof and "contest proof"
solution. One thing that could be dangerous about the SHV connector is
that someone (not me) can try to plug it into an existing BNC socket,
however I guess that is not possible without force due to the design
of the connector.
73
Marius
LB3HC
On Fri, Sep 10, 2010 at 12:38 PM, <TexasRF@aol.com> wrote:
> Or, use two connectors, one for B plus and another for B minus.
>
> 73 de K5GW
>
>
> In a message dated 9/10/2010 5:32:38 A.M. Central Daylight Time,
> rezycle.bin@gmail.com writes:
>
> OK, thanks. Will consider a interlock between the racks as well as a
> separate ground strip between the racks. Will probably have to isolate
> the Bminus and therefore the casing of the HV connector (if circular
> connector used), since I will run grounded grid and need a measurement
> resistor for grid current to chassis ground from Bminus.
>
> 73
> LB3HC
> Marius
>
> On Fri, Sep 10, 2010 at 4:04 AM, Han Higasa <higasa@plum.ocn.ne.jp>
wrote:
>> Hi gents
>>
>> Regarding HV connection I am using RG-8U and
>> HN connectors for HV+.
>> HV- is connected by a multi-pin metal remote
>> control connector with its wire harness including
>> AC 100V, DC 12V, grounds, "HV start" and "HV
>> ready" signals, and HV- line.
>> "HV start" signal control a primary power relay.
>>
>> It consists an inherent inter-lock function
>> - without control connection HVPS never ON.
>> And use the order to connect HV+ first on
>> operation, disconnect HV+ last on any
>> maintenance kept a safety for a couple of decades.
>>
>> The RF deck acts as a master, and the HVPS a slave.
>> A possibility that HVPS works arbitrarily will
>> introduce an accident.
>>
>> The ground side of the HN connectors work as
>> a connection of frame ground, but I recommend
>> to use an explicit frame ground line to keep
>> further safety.
>>
>> GL, de Han JE1BMJ
>>
>>
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