• Reset your password
Custom Harmonicas by Andrew Zajac
The most expressive harmonicas

Main navigation

  • Home
  • Custom Harmonicas
  • Dark Combs™
  • Tool Kits and Accessories
  • Learning Products
  • Blog
  • Service
  • Dealers
  • About
  • Contact

Breadcrumb

  • Home
  • Blog posts

Blog posts

Send me a harmonica you have worked on for assessment

By Andrew | 5:22 PM EDT, Fri September 28, 2018

"I don't know what I don't know!"

Send me a harmonica you have worked on for assessment. I can give you pointers and an action plan on how to get your results to the next level.

You can't find a problem unless you know where to look. I will give your instrument an objective 30-point assessment and tell you where to focus your efforts and improve your trouble areas.

You don't have to be a harmonica-service provider or repair tech to use this service. If you are a harp player who enjoys repairing and working on your own harps to save money but are stumped and can't seem to get the results you want, I can help you.

This service is aimed at those who have purchased my USB videos and have applied the ideas but it is also open to all others (an extra charge applies.)

___

- I will only accept professional-grade instruments. I will not accept any instrument Made In China.

- I will only accept clean instruments. Treat the instrument as though you are working on a harp for someone else.

- For the best possible assessment, I recommend you start from scratch on a brand-new instrument. This is only a suggestion; I realise this may not always be possible.

- I cannot guarantee quick turnover. I can commit to assessing your harp within 30 days of receiving it.

- Shipping costs to and from me are extra and paid by the customer. I will send you a Paypal invoice for the return shipping charge once I have completed the assessment and am ready to send the harp back to you.

Please aim for the following SMART goals:

1. The instrument should look nice.
2. The instrument should feel nice in the hand and in the mouth.
3. The instrument should sound nice with regards to tone and tuning.
4. The instrument should respond significantly better than stock.

___


I will contact you with instructions on how to get your harp to me.
___

What is a SMART goal?
S- Specific: What things make a harp great?
M- Measurable: These things can be measured.
A- Achievable: You can change these things.
R- Relevant: These things contribute to making this particular instrument great.
T- Trackable: You can assess how much closer you are to your goal after making a change.

Learning product

Hohner Affiliated Customizer program at SPAH 2018

By Andrew | 3:07 PM EDT, Sun September 23, 2018

"Nothing sounds as good as the Marine Band."

This is taken from Facebook Live (with permission) during SPAH 2018. Joe Filisko is joined by Richard Sleigh and Joe Spiers to discuss the Hohner Affiliated Customizer Program. There was some audio interference which caused a very loud and unpleasant sound in a few spots. I did my best to fix the audio in this edit.

More information about the HAC program is here.

Also check out the Summer 2018 Hohner Easy Reeding magazine

Before & After: Custom Marine Band Reed Plate

By Andrew | 8:12 PM EDT, Fri September 21, 2018

Here's a before-and-after look at a reed plate that has undergone customization.

I spend hours rebuilding and enhancing every aspect of a harmonica as I customize it.

I obtain all parts directly from the Hohner factory in Germany. I don't buy pre-assembled harmonicas because the first thing I would do is take them apart. In fact, I even take apart the parts! A custom harmonica is an instrument that has been rebuilt from the ground up.

Tone Fibres

By Andrew | 8:03 AM EDT, Wed September 05, 2018

Here's a photo of freshly-cut Dark combs™ that have not been cleaned up yet. You can see the layers of paper fibres.

Many other types of solid-surface materials used to make combs can brighten up the tone of your instrument too much. I think one of the reasons my combs offer a darker, more natural tone is because of the network of paper fibres within the material.

These combs have all the benefits of a flat, unsealed Pearwood comb with none of the drawbacks.

Here is the side view of an off-cut piece that I snapped in half by hand - I had to use all my weight to break it in half!)

Here is the side view of a Hohner Marine Band Pearwood comb that I snapped in half by hand for comparison:

My Dark combs™ are made from an earth-friendly composite of 100 per cent recycled paper, resin produced from naturally occurring raw materials and selected natural pigments.

Overblow Science Question

By Andrew | 8:15 PM EDT, Tue September 04, 2018

What happens when you overblow a hole with the SAME TONE on the blow and draw reeds? (Question by Zvika Dror Sparrow) This refers to an altered tuning where the notes of a Standard Richter harmonica are changed to open up new possibilities.

In this setting, if the reeds are not set up for overbends, you will get lots of squealing or as Winslow Yerxa puts it: "noises of unhappy protest."

If the reeds are properly set up, though, you can pop out an overbend.

This is slightly different than a conventional (two-reed) draw or blow bend where you need more than a semitone difference between the pitches of both reeds to "leave enough room" for a bend. For example, that's why there is no real draw bend on the 5 hole of a standard Richter diatonic.

Here's a harp that has some reed work which suppresses the ability of the reeds to squeal. This is hole five:



Your browser does not support MP4 video.

I applied some BluTak to the draw reed to temporarily drop the pitch to the same frequency as the blow reed. You hear both the blow and draw notes (same pitch but slightly different timbre) and the overblow.



Your browser does not support MP4 video.

I did the same thing (same harp) with the five six.



Your browser does not support MP4 video.

It didn't occur to me at the time to attempt and overdraw but I am assuming that if my overdraw technique on holes 5 and 6 were as good as my overblow technique, the note would have popped out just the same.

So, what happens when you overblow a hole with the SAME TONE on the blow and draw reeds?

Answer: The reed can overbend, albeit it's not as easy as when there is more room between the notes. It's a pretty crappy overbend. I would not ever sell a harp set up like this and claim it plays overblows well.

But.... science....

Reed Replacement Screws and Washers

By Andrew | 4:49 PM EDT, Wed August 15, 2018

I'm now providing two types of screws for reed replacement in my reed replacement kit. I also include washers to make those reeds that just won't stand still behave.

All pieces are stainless steel and will never corrode. The Phillips head screw is 5mm long and easy to pick up with your fingers. You need to snip it off once it's in place. The flat head screw is much shorter and doesn't need to be trimmed - just set and forget. To make it easier to handle, you can dip the tip of your screwdriver in some Vaseline to make it stick!

An assortment of 75 pieces is included with the RRK. You can get more pieces here:

Extra Reed Replacement Screws

SilverWing 3-Space Reed Replacer System

By Andrew | 10:14 AM EDT, Sat August 11, 2018


I have been excited to try Michelle LeFree's new 3D-printed Reed Replacer System (RRS) for over a week - It's been sitting at the post office waiting for me.

It's excellent.

The functional part of the system uses a groove whereas other systems use a hole to accept the rivet head. The difference is irrelevant to the end result. The advantage of the RRS is that it makes the job easy, offering a stable platform where everything is lined up. You don't feel like you need an extra set of hands to accomplish the task.

Here is a quick video:

To order one:

mlefree@silverwingleather.com

Something to think about

By Andrew | 8:59 AM EDT, Sun July 22, 2018

The Assessment

By Andrew | 12:54 PM EDT, Thu May 17, 2018

What makes a diatonic harmonica great?

Is it how loud it is? Is it Tone? How about how responsive it is?

Is it how fun it is to play? (and what does that even mean?)

Everyone has different criteria. Is there a way to measure how great a harp is without being biased?

I think so. I call it "The Assessment".

This test will not always produce the same numbers from person-to-person but the trend will be reproducible - the things that make a harp better will tend to make the numbers higher from person-to-person. When you can't rely on absolute numbers, trends are the next best way to go!

The Test:
Pick a standard riff from your repertoire. Make sure it uses bends in both holes 2 and 3 - these are the important holes to get set up right. If you use splits and chords often, pick a riff that includes them, too. As time goes by and you incorporate new styles of playing, your standard test riff should change too and reflect your style of playing.

- STEP 1: Play the riff at regular volume. Play it as many times as you need so that you can assign an score to the harp from 1 to 10 for tone and response.
1 is the worst harp ever and 10 is the best harp ever.
As a reference, most stock harps are a 5 at regular volume.

- STEP 2: Play it at the lowest possible volume. Play it as many times as you need so that you can assign an overall score to the harp for tone and response.
1 is the worst harp ever and 10 is the best harp ever.
As a reference, most stock harps are a 3 at low volume. **If you can't play this harp it at much lower volume than regular volume, the score is zero.

Add the two scores and divide by two.

Example:
Regular volume = 6
Quiet volume = 3

Total = 9/2 = a score of 4.5

Most performance-quality harps (not made in China) can be upgraded by one or two points with only a few minute's work.

Reproducibility: Everyone has different needs and tastes but the things you (or the factory) can do to make a harp get a higher score will mean that another person will tend to score the harp higher too. Players like a harp that responds well and sounds good.

The job of a harmonica reed is to turn breath into sound. Everyone likes a good return on the investment. We don't want to waste our breath and work too hard to achieve volume. For example, a reed with more mass or a thicker reed plate will create more volume but it also may require more work to play. It may play loud, but it may not be as responsive as another reed. It's more desirable for a reed to respond with ease and still produce lots of volume.

Also, a harp that is out-of-tune will always sounds bad, no matter now loud it can play.

Hohner reed plate serial numbers

By Andrew | 6:25 PM EDT, Wed May 16, 2018

Hohner is back to adding identifiers to their reed plates:

"We laser batch numbers on our reed plates, the number has no significant meaning."

i.A. Ciro Lenti
- Service Manager -
Hohner, Trossingen, Germany

In the past few years they had stopped using any identifier. Prior to that (Around 1998-2014) they stamped the date onto the plates like this:

I hope this clears things up!

Basic Kit with Grobet file

By Andrew | 7:57 PM EDT, Thu April 19, 2018

These are the tools you need to keep your harmonicas sounding great and playing well. You may also use these tools to correct factory defects to make your instruments more powerful and play more smoothly.

This kit features a high-quality Grobet file for tuning.

Add the Embossing tool and the Reed Replacement kit to have a comprehensive, professional grade set of harmonica service and repair tools. See bundle options below.

Includes:

Brass reed tool
Dual Reed wrench
Reed support tool with tail
18g Hockey Stick
Grobet file
Compact Reed Plate Claws™
Shim Stock
Assortment of stainless steel screws. These are replacement screws for any popular model of diatonic harmonica.

Items you will need (not included but easily found at a hardware store):

- small screwdriver

_______________________

This kit provides what you need to work on harps anywhere.

Use this kit to:
-Adjust reed shape and gap
-Fix tuning troubles without having to take apart your harp!
-Fix Reed Centering
-Replace lost screws
-Correct the most common manufacturer defect and give your harmonicas more power.

Optional:
- Replace "blown" (dead) reeds with the Reed Replacement kit
- Emboss the slots to increase efficiency




_______________________

These tools are hand-made from solid brass and tempered high-carbon steel. Use these tools on all types of reeds (including Brass, Phosphor Bronze and Stainless Steel reeds).

They are shipped promptly.

Email support is provided with the purchase of these tools. Within the first 90 days of purchase, I will answer any question about using the tools, just email me your questions.

Tools

Short Slot Golden Melody combs

By Andrew | 8:05 PM EDT, Sun March 25, 2018

Are you having trouble hitting the 10-hole half-step blow bend on high-key harps (like Eb or F)? It takes practice but it also helps to have a harp that's set up in your favor.

The forces of nature (i.e. resonance) can act against you if the chamber size has its own resonant frequency that is not compatible with the note you want to play.

I make combs with chambers that are adjusted for the top reeds of Hohner harps in the keys of Dd and up.

Stock Golden Melody combs only come in long-slot dimensions although the reed plates come in two sizes just like Marine Band harmonicas. Expect a big improvement over the stock comb with these custom combs.

I recommend standard thickness for my short-slot combs.

Order here:

Golden Melody combs

Custom comb for Steve Baker Special

By Andrew | 8:08 PM EDT, Thu March 22, 2018

The Marine Band 365 is a 14 hole mammoth harmonica.

The Steve Baker Special is a harp with an altered-tuning based on the 365 design. It has a bass octave on the bottom followed by Standard-Richter tuning from holes 4-13 and an extra hole which further extends the tuning.

To allow the extended range of this instrument, the reed lengths on the top end are quite short.

Using a standard comb, the forces of nature (i.e. resonance) may work against you when you play those high notes. Fortunately, I have a solution.

I have made a custom comb to allow you to overcome those resonant frequencies and allow your vocal tract to best connect with the reeds.

The channels are tapered to provide your mouth with the feel you expect while creating the right size space for optimal resonance for the whole range of reed lengths of this harp.

These combs are available. I only provide them in standard thickness (5.8mm) for best tone and response.

There's nothing like a well-playing harp!

To Tap or to Self-Tap?

By Andrew | 1:31 PM EST, Sat March 10, 2018

Self-tapping screws are sometimes quite difficult to put into fresh reed plates. Here is a way to make the process a little easier using an M1.6 tap.

Video: Answer to the most common customizing question

By Andrew | 9:25 AM EST, Sat March 03, 2018

"What do I REALLY need to do to get a diatonic harmonica to play well?"

I offer a lot of information on my website and USB videos.
Everybody is looking for the quickest way to get the best results and this is the most common question I get. I also cover a great way to practice these skills.

Pagination
  • First page « First
  • Previous page ‹ Previous
  • …
  • Page 2
  • Page 3
  • Page 4
  • Page 5
  • Current page 6
  • Page 7
  • Page 8
  • Page 9
  • Page 10
  • …
  • Next page Next ›
  • Last page Last »
Subscribe to Drupal blog posts

User account menu

  • Cart
  • Log in

All blog posts

No content available.
Pagination
  • First page « First
  • Previous page ‹ Previous
  • Page 1
  • Page 2
  • Page 3
  • Current page 4

Custom diatonic harmonicas, Hohner Affiliated Customizer.
I customize Hohner Marine Band, Rocket, Special 20, and Golden Melody harmonicas.
Andrew Zajac, Kingston Ontario, Canada.
I use a continuous quality improvement process. I use regular evaluation and incremental steps to strive for constant improvement.
Website, text, photos, videos, download documents, designs and products by Andrew Zajac are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Terms of use

Copyright © 2025 Andrew Zajac - All rights reserved