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FDP Forum / Fender Amps: Vintage (before 1985) / 70 SFVChamp

FenderBender 10


Oct 4th, 2018 08:42 PM   Edit   Profile  

I just picked up a 1970 SFV Champ. It smells like it has been sitting for a long time but still fires up. The bounce I put in and around it should get rid of the smell quickly. The speaker has been replaced with a 8" Full Range Acoustic Suspension Radio Shack speaker !! I kid you not !!! I have the original speaker - in the Radio Shack box - you can't make this stuff up. It's a Fender Special Design Speaker with some #'s on the side ending in 8EV - 59. I assume it's the original speaker.
I know bar chords and scales not caps and ohm's. I have a good amp guy that can give it a good cleaning and check up. Can I recone the speaker or just go with a new weber. Has the 2 prong cord also which should be replaced. Super Excited to blast away. Thank you in advance for your suggestions.

Contributing Member

American Patriot

About as ordinary as you can get.
Oct 5th, 2018 10:33 AM   Edit   Profile  

I have 2 of these. They are great amps. You will probably need to do a cap job. A tech can do this easily. A few other caps will also need to be replaced. I'd recommend installing the original speaker also.


Lawndale CA

No Chops but Great Tone ©
Oct 5th, 2018 12:37 PM   Edit   Profile  

Absolutely second the cap job.

But in Champ the only things normally replaced are the electrolytic filter capacitors in the metal "can" and - possibly - the power tube cathode cap. The filter caps should be replaced about every 15 years - sooner if the amp sits for several years, as the electrolytic material can crystallize.

If a filter cap blows - which can happen with NO warning - it can cause the power transformer to burn out.

In decades of working on amps every single BF or SF Champ I've had in here has had the original capacitor can - many weak, failed or working but visibly leaking fluid.

But the tone caps rarely, if every, require replacement and the coupling caps in vintage amps should NOT be replaced unless they test bad. They can't damage the amp and are essential to the tone.

FenderBender 10


Oct 5th, 2018 03:40 PM   Edit   Profile  

Found out the original speaker is a 1968 Oxford. Looking to put in a Warehouse G8C 8" speaker. Good , Bad, Indifferent ? Thanks.

Contributing Member


Oct 6th, 2018 01:22 PM   Edit   Profile  

I have no experience with at that particular WGS offering. But lots of folks seem to love ‘em.

Eminence has an 8” 4 ohm hemp cone offering too. I have one but have not tried it in my Bronco, yet. There’s a link to the speaker in my thread in this forum.

Contributing Member

on the rhine

Oct 7th, 2018 10:20 AM   Edit   Profile  

Hi FenderBender10!

I personally like the old/weak speakers that came in these amps - I think thy add to the TONE.
If you like/want more volume, headroom or "punch", you might prefer a more modern type of speaker.

cheers - C.

Contributing Member


Oct 7th, 2018 06:23 PM   Edit   Profile  

That is very true! The tone in this Bronco I just acquired is so very sweet. It needs a cap-job, which it will get this week. But I'm kinda reluctant to experiment with a speaker swap - even though I have a cool one to try out.

I suspect this was somebody's "around the house learners amp." So the speaker didn't get beat within an inch of its life.

I've had a couple of SF Champs, over the years, that required speaker replacements because the originals were seriously whipped.

FDP Forum / Fender Amps: Vintage (before 1985) / 70 SFVChamp

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