Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: dragonbat13 on October 13, 2021, 09:51:08 am

Title: Blank JTM 45 Chassis source?
Post by: dragonbat13 on October 13, 2021, 09:51:08 am: I need a blank JTM 45 aluminum chassis. It needs to fit in a mojotone head shell. Also needs to be able to support BIG iron. I'm thinking of building one out of a Heathkit W-M5 (I have five of them, two are good for nothing but parts, the other three are being left as hi Fi amps so don't worry😉). But the iron is heavy, I'm sure it's heavier than standard jtm iron.

Thanks.
Title: Re: Blank JTM 45 Chassis source?
Post by: acheld on October 13, 2021, 10:02:08 am: Terry does beautiful work, very accurate. Surprisingly inexpensive, IMO.

https://seasidechassisdesign.com
Title: Re: Blank JTM 45 Chassis source?
Post by: dragonbat13 on October 13, 2021, 10:18:49 am: That's who I was looking for. Thank you.
Title: Re: Blank JTM 45 Chassis source?
Post by: 66Strat on October 13, 2021, 10:21:41 am: The chassis at the bottom of the page should work.

https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&template&thispage=Chassis&ORDER_ID=!ORDERID! (https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&template&thispage=Chassis&ORDER_ID=!ORDERID!)
Title: Re: Blank JTM 45 Chassis source?
Post by: Bieworm on October 13, 2021, 11:33:20 am: I envy you USA guys for your easy access to the most parts of amps, but 2 things are way cheaper here in Europe:
- Used Celestion speakers
- chassis blanks: https://www.tube-town.net/ttstore/tt-chassis-alu-typ-001-standard-430-x-170-x-65.html

And that's with the raised prices. Last year I bought them for 15€!!!
Title: Re: Blank JTM 45 Chassis source?
Post by: pdf64 on October 13, 2021, 01:24:31 pm: Quote from: Bieworm on October 13, 2021, 11:33:20 am
I envy you USA guys for your easy access to the most parts of amps, but 2 things are way cheaper here in Europe:
- Used Celestion speakers
- chassis blanks: https://www.tube-town.net/ttstore/tt-chassis-alu-typ-001-standard-430-x-170-x-65.html

And that's with the raised prices. Last year I bought them for 15€!!!
US made chassis often seem higher quality though, eg higher grade metal, welded corners.
Are the corners of those TT chassis braced somehow, welded, rivited?
I really like the chassis from Modulus, but it’s a PIA having to fit angle strip to brace the corners.
Title: Re: Blank JTM 45 Chassis source?
Post by: mresistor on October 13, 2021, 03:35:28 pm: oops disregard that one was steel
Title: Re: Blank JTM 45 Chassis source?
Post by: dwinstonwood on October 13, 2021, 03:45:00 pm: Quote from: mresistor on October 13, 2021, 03:35:28 pm
https://www.ebay.com/itm/224398633901?hash=item343f336bad:g:1PAAAOSwQEpdYXR~

That's exactly where I bought my blank JTM chassis! Great quality, very rigid, and free shipping!
Title: Re: Blank JTM 45 Chassis source?
Post by: mresistor on October 13, 2021, 05:25:41 pm: https://www.ebay.com/itm/224398633901?hash=item343f336bad:g:1PAAAOSwQEpdYXR~ (https://www.ebay.com/itm/224398633901?hash=item343f336bad:g:1PAAAOSwQEpdYXR~) don;t know why I thought it was steel .
Title: Re: Blank JTM 45 Chassis source?
Post by: Bieworm on October 14, 2021, 05:28:52 am: Quote from: pdf64 on October 13, 2021, 01:24:31 pm
Quote from: Bieworm on October 13, 2021, 11:33:20 am
I envy you USA guys for your easy access to the most parts of amps, but 2 things are way cheaper here in Europe:
- Used Celestion speakers
- chassis blanks: https://www.tube-town.net/ttstore/tt-chassis-alu-typ-001-standard-430-x-170-x-65.html

And that's with the raised prices. Last year I bought them for 15€!!!
US made chassis often seem higher quality though, eg higher grade metal, welded corners.
Are the corners of those TT chassis braced somehow, welded, rivited?
I really like the chassis from Modulus, but it’s a PIA having to fit angle strip to brace the corners.

Ouch! 😉 that's discriminating 😀😀
You're right though about them not being welded at the corners. I don't mind ...
BUT.. lower quality material than US products? I think we can all agree that German made stuff is at least as good. The highest European standards are expressed in DIN (Deutsche Industrie Norm).. think Audi, BMW, Mercedes Benz...
Title: Re: Blank JTM 45 Chassis source?
Post by: EL34 on October 14, 2021, 07:02:33 am: Quote from: dragonbat13 on October 13, 2021, 09:51:08 am
I need a blank JTM 45 aluminum chassis. It needs to fit in a mojotone head shell. Also needs to be able to support BIG iron. I'm thinking of building one out of a Heathkit W-M5 (I have five of them, two are good for nothing but parts, the other three are being left as hi Fi amps so don't worry😉). But the iron is heavy, I'm sure it's heavier than standard jtm iron.

Thanks.

Look at the blank chassis here to see if it is the right size
https://hoffmanamps.com/MyStore/catalog/Chassis.htm
Title: Re: Blank JTM 45 Chassis source?
Post by: Willabe on October 14, 2021, 07:16:17 am: Quote from: 66Strat on October 13, 2021, 10:21:41 am
The chassis at the bottom of the page should work.

https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&template&thispage=Chassis&ORDER_ID=!ORDERID! (https://hoffmanamps.com/MyStore/perlshop.cgi?ACTION=enter&template&thispage=Chassis&ORDER_ID=!ORDERID!)
Title: Re: Blank JTM 45 Chassis source?
Post by: Tone Junkie on October 16, 2021, 12:26:51 am: Plus you can’t beat the fastest shipping in the business. Bill