[Amps] Looking for picture of SB220 interlock switch

[Carl]

Now you are becoming ridiculous.


----- Original Message ----- 
From: "Joe Subich, W4TV" <lists at subich.com>
To: "Carl" <km1h at jeremy.mv.com>; <amps at contesting.com>
Sent: Thursday, November 07, 2013 11:19 AM
Subject: Re: [Amps] Looking for picture of SB220 interlock switch


>
> On 11/7/2013 10:47 AM, Carl wrote:
> > Adding a roll cage into your Prius might also save your life.
>
> Yes, and putting a body around motorcycles would save thousands
> of injuries/deaths a year.  I'm not about to strip the body off
> my automobile and drive it on the interstate.  Saving a few
> minutes in changing spark lugs isn't worth the danger every day.
>
> Since you remove the crowbar from amplifiers you service, do you
> also remove the cover plates from your outlets/switch boxes and
> disconnect the green wire?   After all, those are only necessary
> if those using the house don't have enough personal responsibility
> to keep their fingers out of the boxes or maintain their electric
> powered equipment.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 11/7/2013 10:47 AM, Carl wrote:
>> Adding a roll cage into your Prius might also save your life.
>>
>> However many of us come from the concept of personal responsibility, a
>> bit of training, and the ability to read a warning label.
>>
>> Those that dont/cant are removed from the gene pool which may be a good
>> thing.
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- From: "Joe Subich, W4TV" <lists at subich.com>
>> To: <amps at contesting.com>
>> Sent: Wednesday, November 06, 2013 11:20 PM
>> Subject: Re: [Amps] Looking for picture of SB220 interlock switch
>>
>>
>>>
>>> > That "safety" device can easily destroy your PS and I always
>>> > disable/remove them and add a warning label.
>>>
>>> While it may destroy your power supply it can save your life.  The
>>> best solution is to *add* the primary interlock switches and leave
>>> the crowbar in place.  Disconnecting the primary before or at the
>>> same time as shorting the HV will protect the power supply -
>>> particularly if a properly sized glitch resistor has been installed
>>> in the HV lead between the HV terminal and the crowbar/cold end of
>>> the plate choke.
>>>
>>> Every one of the "big transmitters" I ever worked on had *both*
>>> primary interlocks *and* mechanical crowbars in addition to the
>>> "deadman stick" to be used before reaching into any place where
>>> high voltage could exist.  Some of those power supplies were capable
>>> of as much as 20 KV at 10A - they were nothing to take lightly.
>>>
>>> I would never disable a safety circuit - that is quick route to an
>>> early appearance in "Silent Keys."
>>>
>>> 73,
>>>
>>>    ... Joe, W4TV
>>>
>>>
>>> On 11/6/2013 11:00 AM, Carl wrote:
>>>> That "safety" device can easily destroy your PS and I always
>>>> disable/remove them and add a warning label.
>>>>
>>>> If you are that worried about safety then add a cover switch to disable
>>>> the AC line as many other amps do.  Very simple and inexpensive.
>>>>
>>>> Carl
>>>> KM1H
>>>>
>>>>
>>>> ----- Original Message ----- From: "Geert Jan de Groot"
>>>> <pe1hzg at xs4all.nl>
>>>> To: <amps at contesting.com>
>>>> Sent: Wednesday, November 06, 2013 4:07 AM
>>>> Subject: [Amps] Looking for picture of SB220 interlock switch
>>>>
>>>>
>>>>>
>>>>> I'm preparing to start on an SB220 renovation project:
>>>>> replace capacitors, update diode board, etc
>>>>>
>>>>> The previous owner has disbled the safely interlock by
>>>>> bending the brass strip away and removing the
>>>>> "tapped phenolic spacer". I'd like to restore them.
>>>>>
>>>>> I'm not sure what, and why, the machanical and electrical
>>>>> parameters are of the spacer as I'll need to find something else.
>>>>> I'd expected it to be a metal thing but according to the manual
>>>>> it isn't.
>>>>>
>>>>> Does someone have a detailed picture of the interlock in place?
>>>>> Why is it an isolator? What are the mechanical stresses on the spacer?
>>>>>
>>>>> 73,
>>>>>
>>>>> Geert Jan
>>>>>
>>>>> PS: I know the interlock doesn't make it safe, but 'safer'
>>>>> and that's still a good thing IMHO
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Amps mailing list
>>>>> Amps at contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>
>>>>>
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>>>>> 11/06/13
>>>>>
>>>>
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>>>>
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>>
>>
>
>
> -----
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