Unmarked Microphone bodies and parts (SYT-5, CU-49, HT-11A, GT-2B, and U47)

[micaddict]

Hey Jim, good to "see" you. 

Thanks for chiming in.



Henk

 

[StaticRick]

UPDATE:


Prototypes are finished. . . but, we have a typhoon that has stopped transportation.  More information after the Typhoon clears.  My associate in China will send pictures ASAP and we will see where we are at.

Chunger, any updates on the GT-2B and SYT-5 bodies?

 

[chunger]

UPDATE:


Prototypes are finished. . . but, we have a typhoon that has stopped transportation.  More information after the Typhoon clears.  My associate in China will send pictures ASAP and we will see where we are at.

Chunger, any updates on the GT-2B and SYT-5 bodies?

Nothing new to report about the prototypes except I am told they are completed.  The factory suffered flooding in the typhoon and my associate tells me that the cleanup efforts and repairs/salvage of stock are taking some time.  He is pressing for my project to be top on the queue when operations resume.

 

[StaticRick]

Thanks for the update.  Not much you can do about the forces of nature!

 

[chunger]

Due to late returns, I have the following available. . . please email me [email protected] if interested

1x  SYT-5 body kit new condition
1x  B-stock SYT-5 body kit (small dent in tube near base. . . almost unnoticeable when assembled)

Several people have expressed interest in one of these, and I have directed all parties to monitor this thread for the latest developments on the gen.2  bodies so i thought it fair to post here.

 

[poctop]

Due to late returns, I have the following available. . . please email me [email protected] if interested

1x  SYT-5 body kit new condition
1x  B-stock SYT-5 body kit (small dent in tube near base. . . almost unnoticeable when assembled)

Several people have expressed interest in one of these, and I have directed all parties to monitor this thread for the latest developments on the gen.2  bodies so i thought it fair to post here.

I will take it or i know somebody that will take it , consider it as sold,

Best,
DAn,

 

[Micheal85]

If poctop doesn't want both I would love to be considered for one.

Thanks

 

[poctop]

Due to late returns, I have the following available. . . please email me [email protected] if interested

1x  SYT-5 body kit new condition
1x  B-stock SYT-5 body kit (small dent in tube near base. . . almost unnoticeable when assembled)

Several people have expressed interest in one of these, and I have directed all parties to monitor this thread for the latest developments on the gen.2  bodies so i thought it fair to post here.

I will take it or i know somebody that will take it , consider it as sold,

Best,
DAn,

I will only take te SYT-5 thanks , i guess you can have the GT-2B if you wish ,
Best,
DAn,

 

[micaddict]

Due to late returns, I have the following available. . . please email me [email protected] if interested

1x  SYT-5 body kit new condition
1x  B-stock SYT-5 body kit (small dent in tube near base. . . almost unnoticeable when assembled)

Several people have expressed interest in one of these, and I have directed all parties to monitor this thread for the latest developments on the gen.2  bodies so i thought it fair to post here.

I will take it or i know somebody that will take it , consider it as sold,

Best,
DAn,

I will only take te SYT-5 thanks , i guess you can have the GT-2B if you wish ,
Best,
DAn,

From what I understand, there  are two SYT-5s and no GT-2B.

 

[poctop]

you are correct  ;D cant read anymore,

I only took one of them and that would be the new kit not the B Stock,

Thanks,

dan,

 

[jandoste]

Hey Chunger,
I received my package but without PCBs :'( 
please tell me did you send them or we got a mistake here?

Thanks

 

[chunger]

Hey Chunger,
I received my package but without PCBs :'( 
please tell me did you send them or we got a mistake here?

Thanks

Hi jandoste,

I have no way to cross-reference your groupdiy member id to your order.  Please send me an email with the contact name you used for your order and I can check.  Either I made an error and forgot to pack the pcb or the pcb was not ordered (it is a separate item in the webstore).

 

[jandoste]

Sent an email and PMed

Thanks

Hi jandoste,

I have no way to cross-reference your groupdiy member id to your order.  Please send me an email with the contact name you used for your order and I can check.  Either I made an error and forgot to pack the pcb or the pcb was not ordered (it is a separate item in the webstore).

 

[chunger]

Hi Jandoste,

I just looked at your invoice and the PCB was not ordered. . .  I have logged in webstore and paypal

2x silver teflon hookup wire
1x HT-11A type 1
1x 35mm K67 capsule
1x C12 parts kit with 1uF cap and T14

The parts kit does NOT include the PCB.  These items are listed separately because many builders prefer to source their own electronic components for projects.  Please note the following text in the webstore product description:

"Please note, the item is for the electronic components only. The PCB needs to be purchased separately here (link provided). We are pleased to offer AMI's outstanding T14 reproduction output transformer as an option for this kit."

I apologize for the confusion.  I strengthened the language in the product description when this mistake was made in the 1st batch of parts kits.

 

[jandoste]

My bad :'( When I saw the price 80$ I thought that the kit's price is that 80$
Ok I'll paypal

Thanks

 

[jandoste]

Hey Chung,
I hope you get my paypal fees? I wanted to know if you allready sent the pcb?

thanks

 

[Melodeath00]

UPDATE:

We are now on revision 1.2 of the C12 pcb set.  Only the slightest of changes was implemented on the revision.  The board was lengthened by .060" to give slightly more length to the output capacitor slot.  The V-cap 250V 1uF OIMP type capacitor now fits without mods.  Since the kit-supplied Erse units have been working superbly in stock .56uF and 1uF options, I have not had a chance to test these super-expensive caps that are likely more snake-oil than actual "sonic gold" in our application.  There was discussion about extending the PCB length all the way down to the base of the mic to facilitate easier mounting of the AMI or Cinemag transformer, but recent tests of the clone against vintage original early type C12 leave the question open about whether the larger core early-style transformer may be a better performing setup overall.  Inquiries to Oliver at AMI about possible development of such a reproduction transformer have gone unanswered so far, but I can try Cinemag and other capable transformer specialists to see.  Anyways, the short story is I would like to leave enough space at the bottom of the mic for the larger core transformer should that ever become available.

There was also discussion about printing a dedicated ELA M251 board, but after some thought, Matador figured the changes necessary to the build are trivial enough that we really don't need a new board. . . as originally stated. . . even though he did lay out a board.  So, we will most likely proceed with a detailed build guide on the current PCB for the ELA preamp circuit.  Note:  9 position pattern switching of the C12 will be retained in our build so this will be a hybrid setup.  Sonically, in theory, it should not make a difference how the capsule is polarized.  Benefits are obviously more pattern options, easier build as we retain OEM physical configuration, and the ability to use capsules that do not have isolated backplates (most available options do not have this!).

Prototypes of the 2nd Generation GT-2B and SYT-5 bodies are moving forward.  The latest word is that the factory has completed "some" samples for me.  I presume this is at least the final revision SYT-5 prototype but could very well be both SYT-5 and GT-2B prototypes along with 2nd revision HT-11A headbaskets to incorporate a slight bend in the hoop base for cleaner lines (as originally spec'd but not executed correctly by the first-run factory).  I am again, cautiously optimistic.  A few photos will confirm if we are on-track or stalled again.  There is a Chinese holiday until the 7th (that would be today) so I would think I should hear something around the 10th.  Stay tuned here for updates.

New products are in the pipeline:

1.  "prototyping" pcb set for the HT-11A microphone.  This board is similar to the C12 PCB set but has no traces except for the tube heater supply voltage.  Teflon standoffs in press-fit configuration at the top of the mic will allow for traditional turret-board style wiring of C12, ELA M251, or any number of other mic configurations desired.  For those who would like to experiment with a point-to-point type tube mic build, this is a clean platform to do so in the HT-11A body with minimal fabrication and fitting of parts.

2.  Fully regulated psu board. . . most build problems we have encountered revolve around the passive B+ voltage supply of the current psu design.  The fully regulated design will allow for larger range of voltage adjustment and easier build.  With Matador's attention to the technical details, I am confident this will be clean and noise-free option.  We will of course test it head to head against the existing passive B+ type psu to confirm that it runs without issue.  Wider adjustment range should allow this psu to be used for more microphone types without adjusting passive components.

3.  Switch mode power supply adjunct pcb for U87 AI type circuit to use in conjunction with poctop's DU87 PCB's.

Can you elaborate on the big core transformer? It sounds like you're saying the larger core original C12 sounded better. What was better? Bigger bass?

HT-11A revision - will this include a dampened headbasket to get rid of ring? You said cautiously optimistic, but since I am still waiting on my CT12, I could stand to wait for the revision headbasket, possibly.

C12 point-to-point board - Any timeframe at all, or potential price?

Will it still be possible to get the older C12 PSU board? I just want the closest to original c12 as possible.

Thanks!

Chunger, would you mind addressing these questions? I don't think they've gotten answered yet, but maybe I missed it. Thanks!

 

[chunger]

I've asked the new headbasket be either glued at around the perimeter at the factory or spot soldered all the way around.  Either solution will resolve the "ringing" problem some have experienced.  For now, adhesive seems to solve the problem on current production units.

Both C12 pcb's and point-to-point or "proto" microphone pcb's are now available on the webstore.  The revision 1.2A boards only changed the length a little bit.  If you opt to install the transformer inside the original metal bell cap, you can still do so.

UPDATE:  My samples were damaged in the flooding. . . they are being re-made.  I am informed 2 of the 3 "project" prototypes have already been complete.  These are:

2nd gen GT-2B
2nd gen SYT-5
custom headbaskets for HT-11A (new factory, same tooling because previous factory was leaking the design to other vendors)

I don't know which ones.  My factory rep has let me know they will try to get product in my hands in December.  That is the first "firm" timeframe or at least target timeframe I have heard so I am passing that along if folks are planning ahead.

 

[teacat]

thanks for the update,

My factory rep has let me know they will try to get product in my hands in December.

does this mean prototypes or sale-able units?

 

[chunger]

thanks for the update,

My factory rep has let me know they will try to get product in my hands in December.

does this mean prototypes or sale-able units?

No, this means they will expedite the actual production run once prototypes are confirmed.  December is the target for production units in my hands ready to ship.