#Tag · bonfire.cafe

That actually worked pretty well. Self-made card edge adapter for HP ham shack power supply. Soldering down those slots a little tough but was able to get a good solder joint along about an inch of wire on each side. Fits nice and tight so it won’t come off. Need a little more clearance for the resistor soldered on the left. Otherwise good. #electronics #HamRadio #AmateurRadio

Plastic adapter housing and prepared 1mm FR4 board that will make contact with the HP power supply card edge adapter.

Adapter fitted to an HP power supply, with wires attached and slots filled over with hot glue to cover exposed terminals.

Karl Matthias 🇺🇦

@relistan@mstdn.social · 3 days ago

I'm working on a connector design to use a piece of FR4 copper clad as the power connector on an HP power supply (it has a card edge exposed). This should give a large contact surface area vs the bolts I see people drilling through these. Plus, it's removable. The slots are for soldering power wires to the copper clad in place. The wires will come out the top. If this works, I'll add a fuse block on the side that takes automotive blade-type fuses. #diy_electronics #electronics

A 3D model of a plastic connector to be printed. Fits Hewlett Packard ~12.8V server power supplies.

Karl Matthias 🇺🇦

@relistan@mstdn.social · 5 days ago

My 12 year old CMoy headphone amplifier build got a battery compartment upgrade! The battery has banged around in there for 13 years, but now it will stay there nice and firm. Fun little design, easy print. I got the radius slightly wrong on the corners but it fits well anyway. #Electronics #3DPrinting

Internal view of a Chu Moy headphone amp in an Altoids tin. Now with orange 3D-printed battery box!

ilias :thepiratebay:

@DM_Ronin@mstdn.social · 2 weeks ago

some technical specs from their website for anyone interested - and certainly more skilled than me in this because I'm still under a learning curve around radio stuff 🫣

#Electronics #Hardware #Radio

DUPLEXER: TSI-DPX100

Left side:

Frequency range: 71-76 GHz
Channel bandwidth: 2 GHz
Channel spacing: 0.5 GHz
Return loss: >20 DB
Insertion loss: <0.6 DB
Rejection: >60 DB

Right side: three graphs

First and second graphs: X axis is Frequency, Y axis is Magnitude (dB)
Third graph: X axis is Frequency, Y axis is Group delay (ns) — DUPLEXER: TSI-DPX100 Left side: Frequency range: 71-76 GHz Channel bandwidth: 2 GHz Channel spacing: 0.5 GHz Return loss: >20 DB Insertion loss: <0.6 DB Rejection: >60 DB Right side: three graphs First and second graphs: X axis is Frequency, Y axis is Magnitude (dB) Third graph: X axis is Frequency, Y axis is Group delay (ns)

ANTENNA: TSI-EBA32

Left side:

Frequency range: 71-86 GHz
Maximum duplexity: 33 DBI
Beamwidth (3 DB): 2 DEG.
Return loss: > 20 DB
Radiation Efficiency: >94%

Right side: six graphs showing radiation efficiency (x axis is GHz, y axis is rad efficiency in %), directivity (ϕ = 0.0, x axis is Thega, y axis is magnitude in Db), directivity (ϕ = 90.0, x axis is Thega, y axis is magnitude in Db), maximum directivity (x axis is GHz, y axis is magnitude in Db), min/max directivity for all frequencies (ϕ = 0.0, x axis is Thega, y axis is magnitude in Db), min/max directivity for all frequencies (ϕ = 90.0, x axis is Thega, y axis is magnitude in Db) — ANTENNA: TSI-EBA32 Left side: Frequency range: 71-86 GHz Maximum duplexity: 33 DBI Beamwidth (3 DB): 2 DEG. Return loss: > 20 DB Radiation Efficiency: >94% Right side: six graphs showing radiation efficiency (x axis is GHz, y axis is rad efficiency in %), directivity (ϕ = 0.0, x axis is Thega, y axis is magnitude in Db), directivity (ϕ = 90.0, x axis is Thega, y axis is magnitude in Db), maximum directivity (x axis is GHz, y axis is magnitude in Db), min/max directivity for all frequencies (ϕ = 0.0, x axis is Thega, y axis is magnitude in Db), min/max directivity for all frequencies (ϕ = 90.0, x axis is Thega, y axis is magnitude in Db)

TECHNICAL SPECIFICATIONS

Left side: schematics

Power input to PSU block 12 V DC. PSU output is provided to MCU.

TSi TRX-E1 is a squared block. It accepts the input from:
- PSU block;
- MCU;
- BB TX I/Q;
- External reference frequency 200 MHz;
Output is the BB RX I/Q, which is shared with RSL (Received Signal Layer?)

IMU block provides the Orientation Data (9 DOF) output.

Output of TSi TRX-E1 goes to TSi DPX-100 which indicates it is accepting both TX and RX radio. EBX-32 is antenna that is connected to DPX-100.

Right side:
Frequence 71-76 GHz
Duplexing FDD
RF channel bandwidth 2 GHz
EIRP > 55 DBM
Antenna gain 32 DBI
Interface I/Q, 0-2 GHz
Power 12 V DC
Dimensions 70 mm x 70 mm x 36mm
Weight 200 G — TECHNICAL SPECIFICATIONS Left side: schematics Power input to PSU block 12 V DC. PSU output is provided to MCU. TSi TRX-E1 is a squared block. It accepts the input from: - PSU block; - MCU; - BB TX I/Q; - External reference frequency 200 MHz; Output is the BB RX I/Q, which is shared with RSL (Received Signal Layer?) IMU block provides the Orientation Data (9 DOF) output. Output of TSi TRX-E1 goes to TSi DPX-100 which indicates it is accepting both TX and RX radio. EBX-32 is antenna that is connected to DPX-100. Right side: Frequence 71-76 GHz Duplexing FDD RF channel bandwidth 2 GHz EIRP > 55 DBM Antenna gain 32 DBI Interface I/Q, 0-2 GHz Power 12 V DC Dimensions 70 mm x 70 mm x 36mm Weight 200 G

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