Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: bnwitt on December 21, 2017, 09:30:03 am

Title: Heather or SLO amp
Post by: bnwitt on December 21, 2017, 09:30:03 am
Has anyone in here built a SLO or Heather style amp?  I'm just curious as I have a head cabinet I got off of eBay some time ago which has a 26-1/2" overall length and a 20" control panel opening that I want to do something special with.  I've also got a couple of sets of MM 50 Watt trannies to use and I was thinking a 50 watt version of the SLO would be a really good amp for my local market as well.  I think the Heather is a fairly close version of the SLO.  Is that right?  Comments from anyone who has built either one of these amps would be appreciated.
Barry
Title: Re: Heather or SLO amp
Post by: tubeswell on December 21, 2017, 10:25:34 am
Quote from: bnwitt on December 21, 2017, 09:30:03 am
Has anyone in here built a ... Heather style amp?  ...  I think the Heather is a fairly close version of the SLO.  Is that right?  ...


As in https://www.tedweber.com/heather-c-kt ?
Title: Re: Heather or SLO amp
Post by: bnwitt on December 21, 2017, 10:51:14 am
Yes.  That's the Weber version of the SLO I believe.
Title: Re: Heather or SLO amp
Post by: tubeswell on December 21, 2017, 10:13:05 pm
Here's the SLO100 schematic. Looks pretty similar (at a casual superficial glance).
Title: Re: Heather or SLO amp
Post by: bnwitt on December 22, 2017, 05:08:22 pm
Oh wow!  nice document.  Thank you very much Tubeswell.
Title: Re: Heather or SLO amp
Post by: kagliostro on December 23, 2017, 12:26:02 pm
Ciao Bnwitt

Here attached the layout for a 50W SLO on turret planned and used by a friend of mine to build 3 units

(PS details and Layout on the .pdf file)

(https://i.imgur.com/RhfoBIt.jpg)

Tone Stack components are on pots, instead to be on the board like on some layout you can find on the web


(https://i.imgur.com/Jwi2otx.jpg)

Franco
Title: Re: Heather or SLO amp
Post by: bnwitt on December 23, 2017, 07:25:04 pm
Franco,
Thank you very much sir.  I will study that layout and photo.
Barry
Title: Re: Heather or SLO amp
Post by: kagliostro on December 24, 2017, 01:24:58 am
A bit of photo of the heads build by my friend (50W and 100W versions)

(https://i.imgur.com/RAe7byJ.png)

(https://i.imgur.com/dVQnTaf.jpg)

(https://i.imgur.com/Pjs4xE9.jpg)

(https://i.imgur.com/aPqrYFC.jpg)

(https://i.imgur.com/BX5C1Pc.jpg)

(https://i.imgur.com/QSL6Kr5.jpg)

--

Here another layout you can find on the web

(https://i.imgur.com/KQR7KoB.jpg)

(https://i.imgur.com/HKSt09K.jpg)

(https://i.imgur.com/xeCo2ie.jpg)

---

A brief analysis

(https://i.imgur.com/JG7Wucv.jpg)

Have a nice day

Franco
Title: Re: Heather or SLO amp
Post by: bnwitt on December 24, 2017, 09:19:39 am
Thank you again Franco.  Very helpful indeed.