Amp Kit - MOD® Kits, MOD102+ guitar amp
The MOD102+ expands on the same all analog vacuum tube classic American circuit design combined with a British style Class A output section as the Original MOD102 with additional “+” features. These special features include a three position progressive toggle switch for off-standby-power and additional push-pull functionality for each control - pull out the bass control knob for “mid boost”, pull out the treble control knob for “bright”, pull out the volume control knob for “turbo”. These new features and a JJ ECC803-S (a long plate 12AX7 known for its complex mid range tones) allow for a wider variety of tones and extra control for the user.
MOD 102+ Guitar Amp Kit Features:
- All-Tube Design (solid-state diodes used only for full-wave rectification)
- 8W output power into 8 Ω
- 1 channel
- Vintage channel controls with push-pull functionality: bass (+mid-boost), treble (+bright) and volume (+turbo)
- Vintage pilot lamp and screw-on jewel cover for power-on indication
- Output Impedance: 8 Ω
- Tubes included: one ECC803 (JJ Electronic brand preamp tube), one EL84 (JJ Electronic brand power tube)
- Hammond Mfg 269EX power transformer and P-T31 single ended output transformer.
- Cathode biased class A power tube operation (no bias adjustment needed).
- Point to point hand wiring using terminal strips
- Carbon film resistors
- Metalized polyester coupling caps
- Pre-punched steel chassis
- Assembled Kit Weight: 5.55 lbs.
- Assembled Kit Dimensions: 10" Width x 6" Depth x 5 ⅛" Height
5
| Item Height | 5.125 in. | |
| Item Length | 10 in. | |
| Item Width | 6 in. | |
| Output Impedance (Zout) | 8 Ω | |
| Output Power (POut) | 8 W |
| Packaging Dimensions | 13 in. × 11 in. × 9 in. | |
| Weight (Packaging) | 6.4 lbs. |
 Assembly Drawings | All Models |
| Filter Cap Drain Mod | All Models |
| Parts List Drawings | All Models |
| Schematic | All Models |
| Troubleshooting Supplement | All Models |
| Instructions | All Models |
 Sound Sample | All Models |
My Project Lists
Specifications, Files, and Documents
Sound Samples:
Sound Sample02:50https://www.tubesandmore.com/sites/default/files/associated_files/mod102-plus_sound_sample.mp3
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Questions and Answers
Click each question to see its answers.
2 answers
Can this amplifier be used as an audio amplifier?
Thank you
Wayne
Asked by Anonymous on February 13th, 2016.
February 17th, 2016
Staff MemberTop Contributor
It could be used as an audio amplifier but you would not get a lot of clean headroom before it breaks up. It's design is definitely for guitar.
You could adapt this for hi fi, but you would need to drop the gain in the preamp stage(s), by using several methods, and change some other components for better frequency response. True global NFB, and changing the slope of the gain stage would help, but then you will also need separate phono preamp(s), and another channel for MP3s, digital, or CD inputs, etc. It was designed as a guitar amp. I thought Antique Electronics did make a little hi fi amp kit, at one time. They also used to sell Dynaco parts & modification kits too. I think they still make one that eliminates the need for 7199 tubes.
1 answers
Can this MOD 102+ Version be ordered with the European (220-Voltage) power transformer?
Asked by Anonymous on November 20th, 2015.
November 20th, 2015
Staff MemberTop Contributor
The MOD 102+ kit comes standard with a 115/125 vac power transformer and can not be customized. However, the European transformer can be purchased separately and the kit can be modified to suit your needs.
1 answers
Is there a Hammond cage that fits the chassis?
Asked by Anonymous on November 28th, 2015.
December 1st, 2015
Staff MemberTop Contributor
Our SKU P-H1451-16 should be a compatible fit.
1 answers
What is an ideal speaker (watts and/or size) for this amp?
Asked by Anonymous on February 12th, 2016.
February 12th, 2016
Staff MemberTop Contributor
This amp puts out a max 8 watts output with an 8 ohm load. I'd probably suggest either a Jensen C8R or C10R if you prefer a 10" speaker. A 12" speaker such as a C12R can be used as well. You can visit Jensentone.com to check out sound samples.
1 answers
Can you tell how wide the chassis is without the handles?
Asked by Anonymous on February 24th, 2016.
February 24th, 2016
Staff MemberTop Contributor
The chassis is 10" in length without the handles.
1 answers
How about using a Jensen P10R Vintage Alnico 8Ω speaker? Any reason not to use one? Thanks.
Asked by Anonymous on November 11th, 2016.
November 11th, 2016
Staff Member
Since this is an 8w amp at 8ohms, an 8ohm P10R should work just fine and sound fantastic.
1 answers
Is a 80w-90w 1x12 cab ok for this or do I really have to go for 25w speakers? How will it affects the sound?
Asked by Anonymous on November 22nd, 2016.
November 22nd, 2016
Staff Member
In regards to speaker wattage, you can go up in wattage but you do not want to go down. An 80-90W speaker will work as long as the ohms match. Since this is an 8 watt amp, it is not going to, "push" you speaker to its full potential and break it up. Some people like speaker breakup and some people don't.
1 answers
How would the chassis cage mentioned above work....picture only shows one side but what about access to the controls etc...
Asked by Anonymous on February 24th, 2017.
February 24th, 2017
Staff Member
It attached to the top of the chassis flush. That way there is no obstruction to the controls.
1 answers
Can you flip it over and build a little combo out of it?
Asked by Anonymous on July 19th, 2017.
July 19th, 2017
Staff Member
Yes, some people have mounted this as a combo.
1 answers
Can I get this kit with the Hammond 369EX power transformer to suit foreign (Australia) mains power (240v)?
Asked by Anonymous on August 30th, 2017.
August 30th, 2017
Staff Member
Yes, do a search for K-MOD102-F. This is our foreign version of this kit.
1 answers
Do you carry a higher end output transformer than the P-T31 that will work with the MOD 102+ amp?
Asked by Anonymous on December 1st, 2017.
December 1st, 2017
Staff Member
You can try either the P-T125CSE or P-T125DSE. The footprint will be different as these are larger transformers and you will have to drill at least one extra hole.
1 answers
Can I add a reverb tank to this kit?
Asked by Anonymous on March 9th, 2018.
March 9th, 2018
Staff Member
Not without modification and that would be at the discretion of the builder. We do offer a reverb tank kit called The Wave. Do a search for: K-MOD103.
1 answers
Hello. Which transformer would I need for 240V AC in Australia?
Asked by Anonymous on September 25th, 2018.
September 25th, 2018
Staff Member
The P-T369EX should work electronically, but may have a different footprint. Modifications to the chassis may be necessary for installation.
https://www.tubesandmore.com/products/transformer-hammond-power-190-0-190-v-75-ma
1 answers
Would it work with a 16ohm speaker (of course with overall lower power output)? I have a cab and wanted a small head like this to use it along with my cab
Asked by Anonymous on February 1st, 2019.
February 1st, 2019
Staff Member
Yes, it is safe to use a 16 Ohm speaker with this amp.
1 answers
Is this amp good for bass?
Asked by hyperchuck on January 22nd, 2021.
January 26th, 2021
Staff Member
Bass amps will traditionally be higher in wattage to allow for clean reproduction of low notes at reasonable volume levels. This amp may get into breakup earlier than anticipated when using it with a bass, but if that sounds ideal for you, this may be a great fit.
1 answers
Can I install another input for guitar/mic?
Asked by Anonymous on June 4th, 2021.
June 4th, 2021
Staff Member
It is very likely possible, but changes to the circuit or modifications to the kit would be done at the discretion of the builder.
Product Reviews
This is a great amp! It has great clean tone and reacts well to my pedals. I never crank the volume past about 9:00 (I have small kids at home), but at low volumes it sounds lovely. The kit was easy enough to build, and the instructions were appropriately detailed for a novice builder. The components seem to be decent enough quality. I notice the control labels recently received a refresh (shortly after I purchased mine, apparently); I hope they took the opportunity to improve the quality of the material used for the labels, as the vinyl-backed paper used before tends to degrade quickly with any rubbing or curling. Also, I had trouble getting the self-tapping screws for the chassis to self-tap; I had to use a tap bit on my drill to cut through the chassis sheet metal. I would also recommend printing the parts list in color to help with identification of the resistors (unless you have your color codes memorized), as the instructions I received were black and white. For the money, though, this is an excellent kit - fun and straightforward to build, with delightful results.
Nice little kit! Instructions are pretty clear and it's certainly not overly complicated to build. Having some amp repair/building experience helps, but I'd say even a beginner could buy this, build it, and be playing it within a day or so. Once built it sounded pretty good as well. Fun to swap tubes around, substituting the 12AX for a 12AT, AY, or others. The 'effect' changes on the pull switches are pretty subtle, so don't expect anything dramatic there. But, the amp makes a great platform for learning, and even 'expanding' from the original design. I've put an EIA connector in the back of mine so I don't have a cord sticking out. I put some tall 'feet' on it so it would clear a speaker box handle. And, the power transformer is suitable for adding a 6CA4 rectifier, which I plan to do in the future. I'll have to move the filter capacitor section around some to make clearance for the socket, but it's a 6 volt 9-pin rectifier, so will work perfectly in this amp. I might even 'upgrade' the output transformer....or play with some yellow jacket type adapters to try a different output tube. In all, a lot of fun to build, sounds great for what it is, and I'm very glad I made the purchase!! A 'GREAT' value!!!