Heathkit SB610
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For more information, see https://www.radiomuseum.org/r/heath_monitor_scope_sb_610_sb61.html
Heathkit SB 610
| Preliminary Information | |
|---|---|
| Release Year | 1966? |
| Mounting Technology | Point to Point |
| Capacitor Types | Aluminium Electrolytic, Ceramic, Silver mica |
| Destructive Entry | No |
| Power Requirements | |
| Input Voltage | 240V/ 120V AC |
| CRT Guides | |
| General Information · Repair Cautions | |
Known Issues
Symptom or Problem Encountered
Causes
- Dim CRT
- Poor focus
- Low B+
- No signal displayed
Solutions
- The dim was due to the original filter caps in the CRT supply puling the 1500V supply low so the two originals were replaced with 4 new film caps.
- The poor focous was due to the focous potentiometer been bad.
- The low B+ was due to the original filters been shorted
- the no signal was due to a bad 6BN8 which was replaced.
Disassembly Notes
This is a tube based unit with a CRT and has up to 1500VDC all over the insides.
To remove the SB 610 out of the outer case just unscrew the four feet from the bottom and slide it out of the back. The bottom of the chassis is easly acesable however this means it is easly exposed so be wary of shocks as the capacitors can still hold charge for a long time.
Original Parts
Filter capacitors
C602A, B, C, D is the 4 section capacitor can
TBD is a holder till the designations can be found.
| RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Height | Lead Spacing | Temp | Type | Brand | Series |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C602A | 1 | 30 µF | 450V | Twist lock | 0 °C | Aluminium electrolytic | Mallory | ||||
| C602B | 1 | 20 µF | 450V | Twist lock | Aluminium electrolytic | Mallory | |||||
| C602C | 1 | 20 µF | 450V | Twist lock | Aluminium electrolytic | Mallory | |||||
| C602D | 1 | 20 µF | 450V | Twist lock | Aluminium electrolytic | Mallory | |||||
| C600, C601 | 2 | 40 µF | 350V | Axial | 85 | Aluminium electrolytic | SYNCRO | C-25-41 | |||
| C606 | 1 | 0.15 µF | 1600V | Axial | Aluminium electrolytic | ||||||
| C605, C604 | 2 | 0.1 µF | 1200V | Axial | Aluminium electrolytic | ||||||
| TBD1 | 2 | 10 µF | 450V | Axial | Aluminium electrolytic | SYNCRO | |||||
| TBD2 | 2 | 0.2 µF | 200V | Axial | Resin | Sprauge | |||||
| TBD3 | 1 | 0.5 µF | 400V | Axial | Tubular paper | General instruments | |||||
| TBD4 | 2 | 0.25 µF | 400V | Axial | Tubular paper | Sprauge | |||||
| TBD5 | 1 | 0.1 µF | 600V | Axial | Tubular paper | Sprauge |
Replacement Parts
Filter capacitors
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| C602A | 1 | 336TTA450M | DigiKey Mouser |
| C602B, C, D | 3 | 226TTA450M | DigiKey Mouser |
| C600, C601 | 2 | UCY2V390MHD | DigiKey Mouser |
| C606 | 1 | 940C16P15K-F | DigiKey Mouser |
| C605, C604 | 2 | 940C12P1K-F | DigiKey Mouser |
| TBD1 | 2 | TVA1705-E3 | DigiKey Mouser |
| TBD2 | 2 | MMWA2P22K-F | DigiKey Mouser |
| TBD3 | 1 | MMP4P47K-F | DigiKey Mouser |
| TBD4 | 2 | 224MWR400K | DigiKey Mouser |
| TBD5 | 1 | B32921C3104M026 / MKT1813410635 | DigiKey Mouser |
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.
Kits
- Digikey BOM: https://www.digikey.com/