Skip to main content

Bottlehead Crack Headphones Amplifier (Part 2) Cleaning Process

On my previous post about this Bottlehead Crack amplifier that bought by my friend is in the very dirty condition.

The most scary things is the rust on top of the power transformer. The wooden box also break into 2 pieces when it comes to me. I think this is not quite common for the second hand condition like this.

That is why in this post, I will clean it up and make it like new.

My first steps is open the transformer cap and clean the rust.

Luckily the rust only on the small area the transformer, so cleaning them will easy. I am using sand paper and brush to make sure the rust is completely gone.

After that, the next steps is paint the transformer.




While I let the paint to be dry, I attach the broken wooden casing by using glue.

The behind story of this wooden case break into two pieces is actually almost make this amplifier broken into pieces. It is break when I was carry the whole amplifier on my hands. It is drop by few centimeter above the ground and I could not imagine if it is fall above a meter. The condition could be worse.


This wooden glue require a day to fully dry, so I return to the amplifier board again. I polished the transformer cap and this is the result.

The next step is polish the top plate.


I will change the RCA jack to the brand that I use very often, it is the CMC RCA jack.




Then I attach the ALPS potentiometer into a board. The main purpose of this board is to secure the pins from bending or broken. It is also look nicer.


The last upgrade is replace the headphones socket.

The OEM Bottlehead Crack amplifier using standard industrial socket. Then I upgrade it to Neutrik gold plated headphone jack.


On the next day, with all glue already dry, this is the look of the Bottlehead Crack headphones amplifier.

It is just like new.






Disclaimer: Any statement and photos in this article are not allowed to copy or publish without written permission from the writer. Any injury or loss from following tips in this article is not under writer responsibility.

Comments

Popular posts from this blog

OPA1622 Vs. OPA627 High Performance Op-amps Comparison

This op-amps comparison topic is actually boring, but at the same time, many of us still curious about what others think about it. The reason is simply because of the op-amps variation are hundreds and they are depends by the implementation. The op-amps are considerably cheap and an interchangeable electronic components but they are not built for the same function. So in this discussion, I will focus on the modern Vs. vintage high performance op-amps in the simple non-inverting pre-amplifier gain stage.

Vintage Multibit R2R DAC Tier List

At the very beginning of this year, I committed to explore the best multi-bit R2R DAC. This is simply because I have plenty of the resources (from broken old unit CD player of course) and ability to build them up. If you think this kind a recycle from old un-used unit to become something useful, than I should stated myself giving contribute for greener world:) After all DAC that I built in this year, I think it is better for me to list them up again in one single page like this. Then I will rank them up in a simple tier list. The reason for this, so you all know what my opinion about of those vintage multibit R2R DAC especially in the sound quality.

TDA1543 DAC Review In 2021

It is a fine day and as usual I am reading and searching online contents related to almost anything I like. During my search, I stop to the few online forum discuss about a simple DAC using TDA1543 DAC IC. The discussion about this DAC was about 3 years ago, and the latest was about a year ago. Quite new and overall discussion about this DAC sound quality mostly are positive. It is interesting topic anyway especially I was built this TDA1543 DAC long time ago in 2016. At that time, I combine this DAC with Tripath amplifier  here  and  here  before it sold in 2019. That is also my first DIY DAC and I am quite enjoyed this DAC so much, at that time. The background story about this, previously I was using Sony Playstation SCPH-1002 as my reference CD Player. The reason I moved to this TDA1543 DAC is because the CD optic inside the Playstation is wear out and I cannot find the replacement for it. I pretty remember the sound quality of this TDA1543 DAC is quite comparable...