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All About Harmonica Microphones - And Then Some

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BlowsMeAwy Greg
Jun 20, 2010 9:08 PM GMT

Hi, Folks -

I have completed a primer about harmonica mics and things related - how to choose one, how to get good tone, how to deal with feedback, etc. Adam was actually going to make it available at HCH but printing costs were prohibitive - so I have posted the PDF at my web site.

I hope this document will help you understand some of the stuff nobody teaches you - and allow you to make better decisions when you decide to go amplified.

Here's the link:All About Harmonica Microphones - And Then Some (pdf)

It's 18 pages or so so you may want to download it and print it out.

I hope to keep this document updated, so if you have a question on the topic that it does NOT answer - please let me know!




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Comments (9)

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Jun 20, 2010 9:09 PM GMT
BlowsMeAwy Greg Replied:

Sorry - broken link. This should work ......All About Harmonica Microphones - And Then Some (pdf)

Jun 21, 2010 1:33 AM GMT
BlueMoose Replied:

Thanks Greg! A well thought out and presented piece of work.


ain't busted but I'm badly bent

Jun 21, 2010 4:55 AM GMT
Chris C Replied:

Thank you Greg. I will be eating this up for some time.

Jun 21, 2010 1:57 PM GMT
Ana R Replied:

Thanks Grag,

I'm aready printing it and can't wait to get home and read it!!!

Jun 21, 2010 1:59 PM GMT
Ana R Replied:

Thanks Greg,

I'm already printing it and can't wait to get home and read it!!!

Jun 21, 2010 2:58 PM GMT
Ana R Replied:

Sorry for double post, don't know how to erase it.


I have one question regarding tubes. I have Fender Blues Junior and it has 3 12AX7 preamp tubes. I have some spare tubes that Snakeman sent me, two 12AU7 and one 12AY7. I've asked few guys about these tubes and they adviced me that I shouldn't put these tubes because it will overheat the amp ( or some similar answer, can't remember exactly). On the internet I've read that I should put 12AY7 in V1 slot.

What is your opinion, should I try these tubes and if so in what order?


Jun 21, 2010 5:18 PM GMT
Reed Triller Replied:

Thank you! I have been looking for something like this for mics and amps for a while.

Jun 21, 2010 9:16 PM GMT
BlowsMeAwy Greg Replied:

Hi, Ana

I'm assuming on your amp that V1 is the tube closest to the side wall of the amp, and V3 is closest to the center.

I recommend you replace V2 and V3 with the 12AU7's and try that. You should notice a big difference - more harp friendly, more "cushion" between feedback and no feedback. If that is STILL too sensitive, reduce the gain of V1 - try a 5751 or 12AY. If it is TOO muddy/slushy, then increase the gain of V3.

Let us know what works for you. The Fender Blues Jr. really does need "taming".


Jun 22, 2010 6:20 PM GMT
Barbeque Bob M Replied:

One thing to remember is that different brands of the same numbers of tubes can and often do sound and react very differently. For an example, an NOS GE 12X7 will sound very different than one made by Phillips/Sylvania (NOS), and those will sound different than an RCA and that's another thing to take into account. Same thing with power tubes and rectifier tubes as well.

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