From the Hammond 1750 output transformer series, this is listed as a drop-in replacement for a Fender Vibrolux Tweed, 5F11  -  they're supposed to look similar to the original Fender transformer where possible.  Materials etc are also supposed to be similar to get as close as they can (within reason I suppose).

I have one on order for one of the small PA heads that I picked up recently, so see how it goes when it arrives later this week.   It was a bargain, at $76 +GST from Mouser, including free delivery. 

• 8,000 ohms plate to plate
• 16, 8 & 4ohm secondary windings (these options would not have been on the original)
• rated at 15w
• bobbin wound

Turn Ratios

4 ohm turn ratio     44.77  (2004.35)

8 ohm turn ratio     31.58  (997.29)

16 ohm turn ratio   22.38  (500.86)

Frequency response

75hz to 15khz  

Inductance

19.66H

HAMMOND 1751M OUTPUT TRANSFORMER DATASHEET

THIRD MAN: Fuzz A Tron

 If you're in the USA, for $75 you may as well buy the kit.   

THIRD MAN FUZZ A TRON VERO LAYOUT

Spoiler alert - it's a modded Fuzzrite.  330k resistors instead of 470k, and it's missing a resistor that formed a high-pass filter on the output of Q2.

VALVE DATASHEET: 6V4 Full Wave Rectifier

 

6V4 / EZ80 FULL WAVE RECTIFIER DATASHEET

PHILIPS: 976B Valve PA Amplifier

eBay purchase - it listed a bit on the high side, but after a quick chat the seller revised the price down to something very reasonable, so I couldn't pass it by.

External references:  Tim Robbins blog.  Radio Museum 

PHILIPS MODEL 976B, VALVE PA AMPLIFIER

Made in Australia in the mid to late 1950s, this is a compact valve PA head is rated at 8 watts.

I wasn't super excited when I cracked the lid open - I think this is referred to in the USA as a 'barn find'.  Fortunately it mostly superficially and it cleaned up OK.   The transformer rust came off without much effort.  The electrolytic filter caps don't look so good, but will see how they test after bit of time on the variac.

VALVE LINE-UP 

2 x Brimar UK 12AX7 dual triodes
2 x Miniwatt 6M5 pentodes, cathode biased (EL80)
1 x Miniwatt 6V4 full wave rectifier (EZ80).  9 pin miniature type

Expected output, 8w

INPUTS / OUTPUTS / CONTROLS

INPUTS:          PU (phono input for crystal cartridges) & Microphone 
CONTROLS:   PU Volume, Mic Volume, Tone (music / speech)
OUTPUT:         Speaker binding posts, fixed impedance, currently set to 1200 ohms!

TRANSFORMERS

POWER:   
CZ344217
300-CT-300 for B+ 
6.3-CT-6.3 for heaters

OUTPUT:  
OT 903
0, 300, 600, 1200 + 2 ohm FB winding

An input transformer has been wired in, which is connected to both inputs (PU and Mic in parallel) - the PU volume control has been disconnected.  I doubt this is a factory mod, but who knows.  

I am happy to see a lot of poly caps, as I was expecting mostly the wax paper type that is always leaky.  I have a feeling that these may have been replaced at some stage, but not recently.

PHILIPS 976B SCHEMATIC & TECHNICAL MANUAL

VALVE DATASHEET: 6M5 Pentode

 MINIWATTS 6M5 PENTODE DATASHEET