Hiss in BF Super Reverb
Moderators: pompeiisneaks, Colossal
Re: Hiss in BF Super Reverb
It was the Vibrato disconnect...fixed! I disconnected it as I didn't have a switch pot
Re: Hiss in BF Super Reverb
From what I've heard, Fender marketed the Super as recapturing the classic sound of the '59 Bassman (nonsense, of course). That was a 2-ohm speaker load, so they probably went with it. Don't know how many 16-ohm 10"s were available then, either. Tho' they could have used 8s wired series-parallel or parallel-series and wound up back at 8 ohms. Nothing they did surprises me anymore...Bob-I wrote:I also don't understand why they went with 2 ohms. That's so close to a dead short you'd think they'd use 16 ohm speakers and a 4 ohm xformer like in the bassman.
Re: Hiss in BF Super Reverb
Ever thought about the turret board? Old Fender boards can draw humidity, which will lead to nasty symptoms that are very hard to track down.
Regarding the Cesar Diaz mods, I would recommend putting your '66 SR back to stock. If you really want an amp close to what Diaz did to SRV's, you are better off building one, as almost nothing is left from the original.
From what I have read over the years and also from looking at the Diaz designed Vibroverb reissue you would need to change not only deactivate the Normal channel, tremolo and reverb, but also to replace the OT by a Twin Reverb's used with a half load its impedance matches the SR's, but delivers a bigger, tighter and cleaner tone), change most part values in the pre-amp, change rectifier to silicon diodes, raise the 1st stage filtering, replace the speaker baffle board by a thicker one made of baltic birch plywood and finally the speakers by 10" Electrovoices. Unconfirmed rumours include Sylvania 7581 or even GE6550 power tubes.
All that seems to create an Amp that sounds tight, defined, transparent and very open when turned up over 5 or 6. Tonequest Report had an article on one of SRV's Vibroverb that was stolen and sold later to a guy who finally gave it back to the Vaughan family, not before checking it out. It was reported to sound very stiff, harsh and trebly.
Not to talk about the player's impact in the final tone, unfortnately
.
Regarding the Cesar Diaz mods, I would recommend putting your '66 SR back to stock. If you really want an amp close to what Diaz did to SRV's, you are better off building one, as almost nothing is left from the original.
From what I have read over the years and also from looking at the Diaz designed Vibroverb reissue you would need to change not only deactivate the Normal channel, tremolo and reverb, but also to replace the OT by a Twin Reverb's used with a half load its impedance matches the SR's, but delivers a bigger, tighter and cleaner tone), change most part values in the pre-amp, change rectifier to silicon diodes, raise the 1st stage filtering, replace the speaker baffle board by a thicker one made of baltic birch plywood and finally the speakers by 10" Electrovoices. Unconfirmed rumours include Sylvania 7581 or even GE6550 power tubes.
All that seems to create an Amp that sounds tight, defined, transparent and very open when turned up over 5 or 6. Tonequest Report had an article on one of SRV's Vibroverb that was stolen and sold later to a guy who finally gave it back to the Vaughan family, not before checking it out. It was reported to sound very stiff, harsh and trebly.
Not to talk about the player's impact in the final tone, unfortnately
.Re: Hiss in BF Super Reverb
Mike, I resolved the issue. It's not the board. Thanks for your opinions on the mod. I'm happy with what the mod yielded and I'm familiar with Cesar changing the transformer as well and the EV speakers. I may put it back stock one day, but I'm quite happy with the results. It's most definitely a players condition amp and I'm ok with modding it as I see fit. Thanks
Re: Hiss in BF Super Reverb
Hi Dion. I'm in the same process with my '77 Deluxe Reverb. How did you finally resolve the issue? I'm trying to avoid replacing a bunch of resistors. Thank you.