Yeah same here, I can't find any photos of one online, would be nice to see
how he intended to have it layed out. If anyone knows of someone who built
this design, or even knows of a picture or two please post! I can look at
schematics all day, but a picture really puts them into perspective.
That's seems to be the consensus, a HV feedthrough.
73,
Scott
----- Original Message -----
From: "Roger" <sub1@rogerhalstead.com>
Cc: <amps@contesting.com>
Sent: Saturday, February 14, 2009 1:21 AM
Subject: Re: [Amps] Amp Design Question...
>
>
> KB0NLY wrote:
>> Looking around the web tonight for 6m amp designs using the GI-7B and i
>> came across this schematic...
>>
>> http://yu1aw.ba-karlsruhe.de/shema%201xGI7B%202m&6mmod.gif
>>
>
> I'd love to see some photos of the physical layout of that amp.
>> I understand the schematic except for one thing.. At the top middle
>> where the connection for +Va is shown it comes down to a second
>> connection point and then it shows a ground to the left and a connection
>> to what appears to be a large cap to the right, i assume its a capacitor
>> as that makes the most sense but these foreign guys use different symbols
>> for stuff sometimes. Why is that second connection point with the (o)
>> and a ground connection to each side there? Seems to be a dead short for
>> the HV.
>>
>>
> To me that represents a feed through or chassis connector. I used to
> work on some German industrial RF equipment that used that symbol where
> a line passed through a bulkhead. *Sometimes* they were a feed through
> cap, but usually just a mechanical feed through.
>
> 73
>
> Roger (K8RI)
>> He also doesn't mention what the value of this capacitor labeled as Ca
>> should be. I know, this could be a stupid NOOBIE question but these
>> foreign designs are always so sparse on the information and there is
>> hardly any explanation, etc..
>>
>> I like his design overall though, looks fairly simple, thinking i could
>> do my SB-200 conversion so its a 6m/2m amp in one. If anyone has built
>> one of these please pass along any info you have! A picture says ten
>> thousand words for me.
>>
>> 73,
>>
>> Scott
>>
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>>
>>
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