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Smooth Drawbar Conversion - Hammond BV


Dave The Rave

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I did the smooth drawbar conversion on my "charity store" BV a while back. I'm very pleased with the results - it's much nicer to play than with the old ratchet drawbars.

 

I took pictures of the conversion. I just made time to put them all up on my website. Take a peek HERE if you're interested.

 

Cheers,

:DTR

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Cool! The BV/CV are screamin' organs.... now if you add the Trek percussion unit you will have an incredibly kicka$$ rig!

I used to think I was Libertarian. Until I saw their platform; now I know I'm no more Libertarian than I am RepubliCrat or neoCON or Liberal or Socialist.

 

This ain't no track meet; this is football.

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Moe, you could re-cap it again with values that will put the tone right in the sweet spot. If you've still got the old capacitors, measure 'em, and then measure the new ones you put in, then buy some more that split the difference and solder them in.....easy!

 

The capacitors to play with are the ones that set the frequency response - any coupling or feedback capacitors. The big aluminum power supply decoupling capacitors shouldn't make any difference as long as they are effective over the whole of the audio range - so you can probably leave those alone (i.e. leave the new ones in).

 

Cheers for now,

:DTR

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Ah, we are talking about different things. I recapped the generator with a Goff kit, not the preamp. The old caps are long gone. Maybe I should have the preamp done and complete the job.

 

It's such a hassle to chase down parts though - does anybody have a kit these days?

Moe

---

 

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Moe, you recapped the generator?! Wow, that's a HUGE job! All the advice I read on the various Hammond Organ forums said to recap the pre-amp first and the generator only if absolutely necessary.

 

I found all the capacitors I needed at Antique Electronic Supply . They have tubes too if you need them. I don't know of any kits available, sorry.

 

I would absolutely recommend doing your pre-amp asap. Old capacitors dry out and loose their capacitance. This would tend to make the pre-amp have less gain at low frequencies, which is exactly what you're experiencing ("harsh"). In my BV's case, the difference was dramatic.

 

Good luck...let us know how you get on.

 

Cheers,

:DTR

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