My Rambling Thoughts

New and old air-con power comparison

Red is new air-con. Blue is old air-con.

New air-con is very efficient. Once cooled, it uses just 100 Wh to maintain the temperature.

Old air-con is slightly less efficient. It needs around 125 Wh to maintain. Even so, this is better than the old CU — that used around 175 Wh.

Daily average is now ~6 kWh (projected to be 180 kWh per month). It used to be 9+ kWh (~300 kWh per month). In comparsion, my fridge's daily average is 1.9 kWh (~60 kWh per month) — it is really efficient.

So non-Inverter air-con is actually only slightly less efficient than Inverter. It is just that my original CU was too old and operated inefficiently.

Last time extension for Daikin air-con

Changed the Control Unit for $490, vs $690 for the whole outdoor unit.

Good news: it now works properly. The compressor and fan are on only when cooling is active.

Bad news: when the compressor is on, it is noisy, like something is vibrating.

The technicians said the noise comes from the condenser and it must be changed — another $200.

But it was working fine before the repair?

I'm not going to spend a cent more. This is the final time extension for my Daikin air-con.

I hope it can last 10 months, then it works out to be $50/mth.

The problem with a new air-con is the pipes. I have three choices:

  1. Reuse existing pipes
  2. Use new pipes, reuse existing trunking
  3. Use new pipes and trunking

#1 is risky cos the pipes are rated for R22 gas only and R32 gas needs higher pressure. But so far every air-con installer says it is fine.

(R22 gas uses SWG23 pipe [0.61 mm thickness]. R32 gas needs SWG21 pipe [0.8 mm], but it is common to use SWG22 pipe [0.71 mm] in Singapore.)

#2 is a problem because of the state of my master bedroom. I have tons of things to remove to access the pipe. Otherwise it would be a no-brainer.

I don't think #3 is necessary. I feel the existing trunking can be used, though it may be a bit tight. The section linking outdoor unit to master room air-con can use new trunking since there are three pairs of pipes.

FF7 polygon figures

Vol 1

Vol 2

If they are cheap — like $5 a figure — I don't mind getting all of them, but they are not, so I only want Tifa, Aeris, Cloud and Barret — just like 90% of FF7 fans. The Save Point is nice, though.

These are very expensive at S$18 a figure and small at 6 - 7 cm.

My budget is $10 a figure. I have no choice but to give these a miss.

Retro music

Listening to retro music with retro music player is especially nostalgic.

I bought the Sony FX-877 Walkman (1999) together with four tapes:

  • The Very Best of Bee Gees – 1995, 30 yuan
  • ABBA Gold – 1997, 45 yuan
  • "Modorn Talkiing" Back for Good (HK) – 1998, 80 yuan
  • Teresa Teng 金曲珍藏 vol 1 – 2007, 40 yuan

I've not heard the characteristic cassette tape hiss for a long time. :lol:

I also bought a Bluetooth dongle so that the Walkman can be connected to Bluetooth speakers/headset.

I found that I don't hear hissing if I use Bluetooth. My guess is that Bluetooth audio compression strips off ultra-high frequencies — my old Bluetooth speaker (Philips HTL9100 soundbar) supports SBC only.

The ABBA Gold tape seems to be sticky. The Walkman stops frequently when fast forwarding or rewinding. The tape can only be played reliably in one direction — it seems the Walkman's motor is stronger turning in one direction than the other! Hopefully this improves with repeated plays.

Bluetooth audio codecs

My S22 phone supports SBC, AAC, aptX, LDAC and SSC. How about my speakers?

Codecs
Philips HTL9100 soundbarSBC
Ugreen BT 5.4 2-in-1 T&RSBC, AAC
Baseus Bowie D05 headphoneSBC, AAC
Logitech BT AdapterSBC
Jabra Evolve 65 SE headsetSBC
Table lamp speakerSBC
61-key Foldable PianoSBC
Mooncake box speakerSBC

Oops, only SBC and at most AAC.

SBC is generally good enough for casual listening.

LDAC is the current state-of-the-art High Fidelity Bluetooth audio, but only when it is using 990 kbps. At 330 kbps, it is worse than SBC.