5V4 in BF Deluxe

From Teleologis–(at)–orry.NoEmail Wed Jul 9 19:06:12 CDT 1997
Article: 55813 of alt.guitar.amps
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From: “Teleologist”
Newsgroups: alt.guitar.amps
Subject: Re: 5U4 in BF Deluxe Reverb
Date: 9 Jul 1997 22:38:33 GMT
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Simply Steve wrote in article
<33c25f8e.8406003--(at)--ews.orst.edu>…
> I’ve used a 5U4 in my SF Deluxe with no problems. It seems to add more
> warmth to overall sound of the amp (which I like) but the sound
> difference is not all that much. Nothing has blown up yet.
>

SF Deluxe Reverbs starting with the AB868 circuit came with 5U4GBs, so there
should be no problem at all with these. Whether the transformer was changed
>from the GZ34 A_764 BF amps to handle the extra current or had enough extra
capacity is the big unknown. In a BF DR the 5V4 may be a better choice.
Another option is a quality NOS 5Y3 in series with 2 diodes on the AC side –
these will take over should the 5Y3 short out, although the voltages will go
up significantly.