[HBR] 6SN7 infinite-impedance upgrade for HBR-14

[WA5VGO]

Are you sure the 6BE6 isn't a product detector? That was a common 
modification that was suggested by Ted. A 6BE6 in place of a 6SQ7 doesn't 
make sense to me.

Darrell, WA5VGO


At 03:30 PM 4/26/2007 -0400, you wrote:
>The HBR-16 uses a 12AU7 for the infinite-impedance
>detector and AVC.
>
>There was evidently an upgrade for the HBR-14 which
>added these features using a 6SN7.
>
>Is the upgrade for the HBR-14 identical to the HBR-16
>section except for the transliteration of a little bottle
>with a big bottle?
>
>Does this upgrade necessitate replacing the 6SQ7 with
>the 6BE6 too, or could it be done in two steps?
>
>Tim. (KA0BTD)