How to half-valve a chromatic?

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Malarz
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Joined: Fri Nov 29, 2019 6:00 pm

How to half-valve a chromatic?

Post by Malarz » Tue Jul 28, 2020 8:08 pm

@brendan

During your seminar/presentation this past Sunday I think you said you have a video on how to half-valve a chromatic. Can you post a link? I’m as far as having removed the valves you indicated (1, 3, 5, 7, 9). Now it is very airy or breathy on those reeds. What is the next step in adjusting the reeds to correct for the excess air?

Thanks.

Ken

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Brendan
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Re: How to half-valve a chromatic?

Post by Brendan » Wed Jul 29, 2020 6:53 am

Hi Ken,

I show how on the first video on this page, from about 4:30:

https://www.brendan-power.com/harmonicas-irish.php

After the valves are removed, reduce the relevant blow reed gaps and the draw reed response should improve significantly. If it doesn't, it indicates that you have sir loss elsewhere, probably in the slide/mouthpiece assembly.

Half-valving only works well on good quality airtight chromatics. What model are you using?

Malarz
Posts: 51
Joined: Fri Nov 29, 2019 6:00 pm

Re: How to half-valve a chromatic?

Post by Malarz » Wed Jul 29, 2020 11:41 am

Hello Brendan,

Thanks for your reply. I am using an almost new Toots Hard Bopper/207. I have sanded the comb and created then gasket as you instructed during the seminar. Air loss might be a poorly created gasket.

I will try to reduce the blow reed gaps later today after work.

I’ll watch your video before I continue.

Thanks again for your guidance.

Ken

Malarz
Posts: 51
Joined: Fri Nov 29, 2019 6:00 pm

Re: How to half-valve a chromatic?

Post by Malarz » Wed Jul 29, 2020 11:44 am

Brendan,

That link takes me to your Irish/Folk Harp page which only has a short audio link at the bottom.

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