Here is a quick shot of the single EL84 amplifier. Chassis was started a little over a year ago and put on the back burner for a while.
The choke filtered power supply is tube and based on the 5U4 rectifier. High quality polypropylene capacitors are used in the first filter stage before going through the choke then a Mundorf electrolytic bypassed with a quality film cap.
Inside you will find a Mod Cap Oil Cap for the coupling capacitors and film shunt capacitors. Internal wiring will be Cryogenically Treated Silver Plated Stranded Copper. Front panel will house two illuminated analog ammeters monitoring each EL84 output tube.
Matching LeAnna preamp models are also available. There is also a SET 300B stereo amp available.
More pictures will be posted as this piece is finished.
(http://www.responseaudiony.com/se84%201.jpg)
Here is a shot of a matching preamp still under construction. zvisit this link to find out more about this custom LeAnna EV Plus.
http://www.responseaudiony.com/customshop.htm (http://www.responseaudiony.com/customshop.htm)
(http://www.responseaudiony.com/Leanna%20custom%2012.jpg)
Sorry about the poor picture quality. Havent had time to get the good camera out.
This custom is completed and ready to go. See all the details at http://www.responseaudiony.com/customshop.htm (http://www.responseaudiony.com/customshop.htm)
(http://www.responseaudiony.com/Leanna%20custom%201212%201.jpg)
And here is the matching Single Ended EL84 amp. Not yet done.
(http://www.responseaudiony.com/84se-1.jpg)
Glorious sound. I was going to keep this setup for myself but someone contacted me today wanting both pieces. Okay, time to build the 300B version :drool:
The new custom LeAnna preamp I am building now has tube tone controls so I think I will build the 300B amp and preamp as a matching set.
(http://www.responseaudiony.com/cust%20syst.jpg)
Very very nice work. :drool:
Is the SE EL84 amplifier one of those lower powered flea watt amps you discussed before? What do the meters in the front specify?
Hello Sleepy and Merry Christmas to you and yours.
Yes, this is one of the amps that will be part of the flea watts previously discussed.
The meters are for current readings on the EL84 tube. However, the current never changes as there is a current sink circuit installed at the EL84 cathodes.
Both pieces officially sold. I'm really gonna miss this amp.
Now, rather than the 300B, I first want to do the PPE34. This one uses 2 EL84's in parallel running in pentode for 10 watts per channel.
I want to come up with a really unique chassis design for this one. Off the wall.
The 300B amp will follow. The chassis is built but have some cutting to do yet after I get the output transformers and then get painted gloss white.
Here is a quickk shot of the chassis under construction for the 10 watt Parallel Pentode EL84 amplifier mentioned above. More details on whats going into this one can be seen at http://www.responseaudiony.com/customshop.htm (http://www.responseaudiony.com/customshop.htm)
(http://www.responseaudiony.com/PPE84%201.jpg) (http://www.responseaudiony.com/PPE84%202.jpg)
(http://www.responseaudiony.com/PPE84%203.jpg)
Quote from: Response Audio on January 17, 2015, 06:55:01 AM
Here is a quickk shot of the chassis under construction for the 10 watt Parallel Pentode EL84 amplifier mentioned above. More details on whats going into this one can be seen at http://www.responseaudiony.com/customshop.htm (http://www.responseaudiony.com/customshop.htm)
(http://www.responseaudiony.com/PPE84%201.jpg) (http://www.responseaudiony.com/PPE84%202.jpg)
(http://www.responseaudiony.com/PPE84%203.jpg)
Very nice!!!
Thank you Pete. The chassis is 1/8" Birdseye Maple over Baltic Birch. The top and bottom pieces are 1/2" solid Cherry painted satin black.
Absolutely LOVE the birds-eye maple!!!
Beautiful!
How about a KT66 amp? :)
QuoteBeautiful
!
Thank you.
QuoteHow about a KT66 amp?
Whenever you're ready :thumb:
Hhmmm.......Maybe I will build this one as a 6L6/KT66 amp. I have planned on the 807 tube but there are adapters that can be used to use the 807 in place of the 6L6. This would provide more versatility over building with the odd 807 tube sockets.
After looking over the chassis above and the design used for the 6L6/KT66 version, I will not build it into this chassis. We will stick with the PPE EL84.
I will start on a new, larger chassis that will be able to run EL34, 6L6, KT66, 6550, KT88 tubes. This requires a larger chassis to be able to house the larger, choke input power supply used in this model. I like the choke input design as it allows the use of one of my favorite rectifiers, the 274B by Sophia Electric.
I am going to build a more standard 'vintage' style chassis for this amp with wither cherry or some of the Birdseye Maple I have.
Loving that wood Bill. really nice.
charles
Hey Bill
I too love the look of your SE PP EL84 amplifier. That wood case looks really cool. Will there be an LED light on the front to show it is on or can you see the glow of the tubes from the top of the amp? The reason I ask is that I was talking to a DIYer by me and we were talking about power LED lights and tube amps. I told him of some other designs where there is no LED light on the front because with the exposed tubes you can just stare at the pretty glowing tubes and not be bothered by a blue led light.
Will there be any fans on the inside to keep the tubes cool especially if you go to 6L6GC type tubes or more powerful ones? I keep thinking an enclosure like that would just have too much heat inside of it with those more powerful tubes.
Now IMO if you are going to go with an amp that uses 807 tubes that has an adapter you've got to show that off. Here is an older amp where I took out the 6SN7 and put in a 6F8G tube. I even tried to match the wire to the wood chassis. I took it a little far but I dig showing off odd stuff like that.
Hi sleepy.... boy that amp looks familiar :thumb:
As far as the PPE84, what you see is only the chassis. The transformers and tubes will be mounted on the top plate (after a thin copper foil is applied). They are not going to be internally mounted. No need for a cooling fan. With el84s, they are bright enough to not need an LED to indicate the amp is on.
I have other chassis in the works for other custom amp and preamp builds.
Also, As seen on the custom shop page of the site, I will be working on an ultimate single ended system. This will.be a time consuming build that I will work on between other orders.
This is another custom Parallel Pentode Edition 10 wpc EL84 amplifier using the RH Design circuit and built around a tube rectified power supply. Transcendar output transformers and choke. Solid Oak Chassis.
This is a look at the chassis prior to any sanding or finishing. Still a lot of work to do. The chassis is constructed of some recycled Oak approximately 3/4" thick that came from an antique dresser that was sitting in my basement at home for several years. The picture with the white squares indicates the layout of all the transformers. In front of the rectifier tube is the choke. Output transformers and chokes are from Transcendar.
(http://www.responseaudiony.com/oak%20PPE84%202.jpg) (http://www.responseaudiony.com/oak%20PPE84%201.jpg) (http://www.responseaudiony.com/oak%20PPE84%203.jpg)
Here are a few updated pictures of the Parallel EL84 amplifier.
(http://www.responseaudiony.com/ppe84%2002.jpg) (http://www.responseaudiony.com/ppe84%2001.jpg)
Here is the PPE84 in action.
Using 2x RCA 6AU6WB driver tubes, 4x Valave Art EL84, 1x Valve Art 274B rectifier. SoniCap Platinum coupling capacitors, Cardas binding post (4 & 8 ohms). Transcendar output transformers and choke.
(http://responseaudiony.com/rh84-ppe-blk.jpg)
(http://responseaudiony.com/rh84-ppe-2.jpg)
Here is a quick shot of another PPE84 amplifier under construction. It is part of a custom order with this and a full size LeAnna VTPS preamp. Both have Cherry hardwood finish with Satin Lacquer.
This picture is prior to any sanding or finishing. I will provide updated photos as this build progresses.
(http://www.responseaudiony.com/PPE84-UC1.jpg)
Lettering and Satin Finish Lacquer applied.
This amp (a new one built for you) is only $1,395 with all tubes included till July 30th.
(http://www.responseaudiony.com/ppe-EL84-400.jpg)
Here is a look at the preamp that the customer ordered with the amplifier. This is the LeAnna VTPS model.
(http://www.responseaudiony.com/leanna-vtps-CH1500.jpg)
Today is the last day of the introductory prices on the Custom Musica Bella Built RH Design amplifiers.
http://www.responseaudiony.com/rhdesign.htm (http://www.responseaudiony.com/rhdesign.htm)
Due to the new web site, a lot of the pictures have disappeared. Here is a shot of the latest custom PPE84 amplifier. This still remains our most popular of the RH series.
Keep in mind, these amplifiers are one of very few products that will be available as custom builds in 2016.
(http://nebula.wsimg.com/0a4327f484299a56598281dc1d02e71a?AccessKeyId=0D091052FA42114ECF84&disposition=0&alloworigin=1)