[Amps] Pi/L in Ameriton amps?

[Ulf (SM0NOR)]

Yes, you are right....   I was confused because I thought it said "pi-l" in the specs sheet. But it doesn't.

Still my question applies to the bigger amplifiers. For example the specifications of AL-1500 says "pi-l" but if you check the schematics, the third coil, after C2, called L4 is only tapped once!


73's

Ulf (SM0NOR)
ulf at sm0nor.com



On 26 jan 2011, at 13.16, Dave M wrote:

> 
> I hate the layout of the supplied schematic , but it is a standard Pi network not PiL the second coil is strictly for the higher freqs
> 
> 
> ......................................................................................................
> 
> 73     VE3DV , Dave
> 
> 
> 
> 
> 
>> From: ulf at sm0nor.com
>> Date: Wed, 26 Jan 2011 13:04:07 +0100
>> To: amps at contesting.com
>> Subject: [Amps] Pi/L in Ameriton amps?
>> 
>> I'm helping a friend of mine who bought a damaged 811H. Transformer and tubes where gone. New transformer is on the way from Ameritron and tubes we found locally. I think we will have it up and running on no time! Now my question: is it a pi/l tank in this amp? The manual says so but the second coil has only two tappings. Does it mean that the high bands goes through the same inductance and the low bands go through the whole coil? What does it do for the intermediate resistance? I noticed all Ameritron amps are the same. 
>> 
>> Sent from my iPhone
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