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I think that amp is missing one very important part. An RFC to ground at the ANT jack. If the DC blocking cap between the plate supply and the filter network fails, you will have high voltage on the antenna jack. With a suitable RFC to ground, the supply fuse will blow if that blocking cap ever shorts. As is, there is only one capacitor between you and the grave. Adding one is cheap insurance. Neither the standby switch nor the TX relay turns off the HV, you don't need to be on the key for HV to get there if that cap fails.

[QUOTE="brandon7861, post: 856918, member: 53724"] I think that amp is missing one very important part. An RFC to ground at the ANT jack. If the DC blocking cap between the plate supply and the filter network fails, you will have high voltage on the antenna jack. With a suitable RFC to ground, the supply fuse will blow if that blocking cap ever shorts. As is, there is only one capacitor between you and the grave. Adding one is cheap insurance. Neither the standby switch nor the TX relay turns off the HV, you don't need to be on the key for HV to get there if that cap fails. [/QUOTE]

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