page 1
Glasshouse
300BPSE 01/05/04
b. specifications
c. requirements of constructor
CHAPTER 1 - INTRODUCTION
a. about the Glasshouse 300BSE series amplifier
The Glasshouse 300BSE series kit amplifier, features the classic 300B valve in single ended configuration. It is
available in two versions, the 300BSEi integrated (with 6 line-level sources and one tape out) and the power amplifier
version, 300BSEp (driven by a pre-amplifier, passive or active) The output power is 12 watts into a 6ohm load, so
speakers of 89dB and above are required.
The main HT rail is valve rectified using the 5U4 valve, smoothed by a 10H choke and a combination of 4 reservoir
capacitors in a Pi network. This powers the 300B and the EF86 input valves. The driver valve, the 5687 has its own
dual 195Vdc and -195Vdc, formed by a solid state supply. All valve heater supplies are regulated DC. The
amplifier is feedbackless and hardwired, with huge 120 lam 2.5 inch stack output transformers, sitting at the rear,
astride the mains transformer. She is housed in a beautifully designed 2.5mm aluminium chassis, crowned with a
copper plate, with a black transformer cover and valve cover (optional).
power output
input sensitivity
hum/noise
ban/- 1db
input impedance
AC mains voltage input
power consumption
dimensions
weight
connectors
valve sockets
valve compliment
12 watts into an 8 ohm load
370mV
1.2mV
16Hz - 20kHz
100Kohm
110V/120V/220V/230V +/-10%
220W
440mm(w) x 230mm(h) x 440mm(d)
25kg
IEC lead, RCAs x 7pairs(BSEi) or x 1pair(BSEp), 4mm spk post x 2pair
4 x 9BA, 1 x octal, 2 x UX4
2 x EF86, 2 x 5687, 1 x 5U4, 1 x 300B
1.The kit builder needs to be able to solder to a good standard, the majority of problems that occur with kits are down
to poor soldering.
2. Be able to read and understand these instructions completely.
3. To have some knowledge of valve circuitry, general electronics and be able to read a circuit diagram.
4. To have a multimeter that can read up to 1000V dc and be able to use the meter properly.
5. Have access to a dummy load, or a spare pair of speakers and be able to connect them to the amplifier during
testing.
6. Be aware of the precautions necessary to avoid electric shocks from the mains and amplifier power lines.
7. Have patience, if you rush, you will make mistakes.
d. warantee
Part built kits cannot be returned for a full refund. Defective parts will be replaced, provided they are returned within 60
days of purchase and are confirmed to be defective and not misused. Please note that Hi-fi Collective Ltd will assist in
anyway to get your kit up and running. To help you with your inquires, our phones are manned Monday - Friday,
9.00am - 5.00pm, we try to answer e-mails within an hour of them being read. We offer a repair service and will even
finish off a part built amplifier for you. Also, we have a "Turn-on" service, where we will check your work, switch her on,
test her and play her for 20hrs+. We charge £18.00 an hour for labour.
e. disclaimer
WARNING: The high voltages present in this kit can KILL and the high operating voltages can BURN. Observe all
precautions and never connect the kit to an electrical supply until it has been fully assembled, checked and checked
again and ready for testing. You should comply to the requirements of the constructor as listed in c. above. In the
action of purchasing this kit you assume total responsibility and liability for the use and operation of this kit both for
yourself and people around you.
f. company details
address: Hi-fi Collective Ltd, 21 Lakes Lane, Newport Pagnell, Bucks, MK16 8HS
tel/fax: 00 44 (0) 1908 217202
e-mail: [email protected] website: www.hificollective.co.uk
