On Mar 3, 2006, at 9:30 AM, Chris Howard wrote:
>
> That's kind of my trouble...
>
> When thinking about building a legal-limit single tube amp,
> I get the same feeling as when I watch the wordworking program
> on television and see the guy rip-saw through a $200 piece of wood.
>
> I don't trust myself not to quickly destroy a few hundred dollars
> of tube.
>
> I would be sad to blow some 813's (or 4cx250s) but I'm
> scared witless when confronted with an 8877.
A common danger with the 8877 is failure to realize that HF operation
is the most hazardous situation. The gotcha is that at its F-max,
there's c. 5500-ohms of XC in the anode-cathode feedback path.
>
>
>
>
>
> On Fri, 2006-03-03 at 09:52, john.brewer@us.schneider-electric.com
> wrote:
>>> For about the price of a pair of 813s you can get a single 3-500z
>>
>> NOS 813 can be bought on ebay/hamfests for about $20-$30 each. I'd
>> love to find some new
>> 3-500Zs for $50!!
>>
>> John K5MO
>>
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>
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>
>
Rich Measures, 805.386.3734, AG6K, www.somis.org
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